I wonder about this myself, and I've been expecting a crypto meltdown for a while now--not just bitcoin, but all the altcoins and tokens too.  If there's absolutely no barrier to entry to create a currency, and if there isn't any real-world utility in those currencies, how does anyone in their right mind expect them to hold any value?

I don't have any figures as to how many new coins are being produced every year, but I've seen exchanges like Yobit where there are hundreds of them, mostly dead ones that you wouldn't be able to sell at any price.  That's the fate that I'm expecting for most altcoins--forget about inflation; they're going to be worth ZERO. 

Big investors who put money into crypto aren't buying shitcoins like TRUMP or even dogecoin.  I'm pretty sure what they buy is bitcoin & ETH if they invest in crypto at all.  They're also probably trying to make a quick buck, too, as opposed to making a long-term investment. 

I mentioned dogecoin.  That's a coin that's going to have a theoretically unlimited supply if it survives long enough, because there's no cap on how many coins are going to be mined.  If it had a cap, it might be useful in commerce, but it's pretty much always traded pretty cheap.  And that's just one of hundreds of altcoins in existence.  All of these coins are causing "inflation" if only for the fact that there's only so much fiat money being invested into crypto.  There are too many cryptocurrencies in existence and demand doesn't keep up with it.