Who are these "members of the crypto community" with the power to spin up new currencies "on the fly"? I see that Bitcoin owners automatically became Bitcoin Cash owners at the time of the fork, so they doubled up?
I also see that Bitcoin has a hard limit of 21M, can't go past that ... unless you do a hard fork and call it, maybe, Biotcoin Cash and put a hard limit on that of, maybe 21M. So didn't you just double the number with some groovy computer code?
I see that it is believed that "Satoshi Nakamoto" who started the ball on this back in 2008 has 1M Bitcoins, out of a max total of 21M ... not a bad return for a computer program in 12 short years.
I also see that there are a lot of cryptocurrencies now, like more cryptocurrencies than fiat currencies, like a lot more ...
All Cryptocurrencies | CoinMarketCap
As for investment companies getting in on the game ... they'll put your money in anything and charge you for the pleasure - your risk.
I'm a complete skeptic on it. Its biggest advantage is as a money laundering device as far as I can tell. I wonder how much human misery its funding. Its a godsent (or should that be devilsent) mechanism for every criminal and terrorist on the planet.