There is a huge possibility of younger or new generations adopting cryptocurrency investments compared to them getting interests on farming and food related sectors. What do you think? Does it have a good or bad effects on our economy?
What's good about our world is that it is adaptive and has a system of balances. If everyone becomes a crypto-investor - as you realize - you can't feed your family with bitcoins
If (model an extremely critical model) 99% of the population will be cryptoinvestors, then 1% will own their wallets and lives because they will produce a very limited amount of food and will be monopolists of a critical resource.
So I wouldn't build such a scary model.
Yes I am well aware of the degradation of classical rural labor, but they are being replaced by farms. That's progress too - there's no escaping it. But farms and agroholdings are what feeds humanity. So I assume that the risk you describe is unlikely.
PS but there is always an alternative - to invest in agriculture ! I, for example, invest cryptocurrencies in a great agro-project, if you are interested - write me, I'll introduce you to it