I don't think the people who became millionaires through cryptos agree with this statement. but afterwards it is of course easy to talk. the question now is of course whether it is still profitable to invest in bitcoins at the moment, for example. I would say yes. still is some kind of gambling, but that is the wonderful thing of live.
I think that those who do not dare to invest in cryptocurrency are people who do not dare to take existing risks and cannot manage their financial conditions because I see investing in cryptocurrencies as having a very high risk even though like that the profits that can be obtained can be very high because of price movements which is great for making a profit.