“This Stock Could Be Like Buying Amazon in 1997” Simply click below to discover how you can take advantage of this. Image source: Getty Images Another day, more volatility. But I’m not referring to the choppiness in broader equity markets. Instead, I’m thinking of the wild price swings in cryptocurrencies, such as Bitcoin. Market participants highlight that in the cryptocurrency world, prices rise fast and fortunes are created seemingly overnight. But there is always the other side of the coin (no pun intended), where crashes are sudden and severe. That’s why I think average retail investors who plan long-term for comfortable retirements will be better off investing in stable FTSE 100 and FTSE 250 companies, rather than buying into Bitcoin for an adrenaline rush.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…Where the Bitcoin price is nowIf you are following the price of Bitcoin, the world’s most popular cryptocurrency, you may agree with me when I say uncertainty is the only constant. For example, in 2017, the price soared from under $1,000 to nearly $20,000. But it then fell below $7,000. By November 2018, it was below $4,000. Then in June 2019, Bitcoin was over $10,000. But in early January 2020, Bitcoin was back around $7,000. As broader stock markets began falling in February, Bitcoin hovered around $9,000. By mid-March, it dropped to the $5,000 level. On 3 July, as I write, it is hovering at $9,100.Despite the increase in prices in recent years, there are simply not enough merchants using cryptocurrencies yet. In 2019, about $4 billion in bitcoin transactions was sent through payment processors. On the other hand, according to Nilson Report, “Purchase transactions on global general purpose card brands totaled 440.99 billion in 2019, up 19.4% over the previous year“. So wild price swings and high speculation are combined with a lack of global transaction demand. Clearly, investing hard-earned cash (that you want to grow for retirement years) in Bitcoin is not for everyone.Blockchain technology is importantBut there’s a way to have the best of both worlds through buying blockchain-relevant shares. Cryptocurrencies are based on blockchain technology, which can be described as a digital ledger, acting as a spreadsheet. In the future, blockchain applications are likely to impact agriculture, asset management, insurance, healthcare, retail, and supply chain management, to name a few areas. For retail investors, companies that work with blockchain technology may be appropriate businesses to do due diligence on. Their shares may potentially be worthy additions to long-term portfolios.Which FTSE companies would I consider? Several big pharma giants, such as AstraZeneca and GlaxoSmithKline, have collaborated to promote and cut the cost of drug discovery through increased use of blockchains.Grocery stores and food manufacturers, such as Sainsbury‘s and Unilever, are looking at how blockchain could help them keep track of food in the supply chain. Energy giants, including BP, Centrica, and Royal Dutch Shell, are exploring how blockchain technology can be used in the energy sector. Some global banks, including HSBC Holdings, Lloyds, and Santander, are researching the potential use of blockchain-based banking solutions.Investing in FTSE 100 sharesIn the coming years, I expect many FTSE 100 and FTSE 250 companies to embrace ‘blockchain’ technology. And I’d rather invest in these established global companies with robust businesses and stable cash flows. A good number of them also pay juicy dividends.My Motley Fool colleagues regularly cover shares and funds that you could consider adding to a diversified retirement portfolio. They point out that despite various downturns and even crashes, in the long run, stock markets in the UK return about 6% to 8% annually, on average. Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! Forget the volatile Bitcoin price! I’d buy cheap FTSE 100 shares to retire wealthy I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. tezcang has no position in any of the shares mentioned. The Motley Fool UK owns shares of and has recommended GlaxoSmithKline and Unilever. The Motley Fool UK has recommended HSBC Holdings and Lloyds Banking Group. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors. Enter Your Email Address Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. Our 6 ‘Best Buys Now’ Shares Tezcan Gecgil, PhD | Sunday, 5th July, 2020 See all posts by Tezcan Gecgil, PhD I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. 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