In February 2013 1 BitCoin sold for $22.00. Today it sells for $38,000.00 per BitCoin. So maybe Billionaires don't buy it but at $38,000.00 a hit someone is and it isn't me.
2 July 2020, the Indian company 69 Shares started to quote a set of bitcoin exchange-traded products (ETP) on the Xtra trading system of the Deutsche Boerse.[131]
1 September 2020, the Wiener Börse listed its first 21 titles denominated in cryptocurrencies like bitcoin, including the services of real-time quotation and securities settlement.[132]
October 2020, PayPal announced that it would allow its users to buy and sell bitcoin on its platform
Granted CryptoCurrency had it's ups and downs but if you would have bought 200 on 3 January 2009 imagine where you'd be today. Me, I wouldn't buy 1 BitCoin or BitGold or Bit whatever. I like to see and touch. What you said about CryptoCurrencies was like to what we programmers said about Microsoft in 1981.