Obviously you don't understand blockchains. You can't mine more coins than is given at a rated time. If you increase the hashrate on a network, the network difficulty spikes to compensate for it. Meaning the same amount of crypto is earned over time no matter what the hashrate on the network is, with more people it's distributed more is all and the network becomes more secure. The more decentralized the network is, the more secure it is (and less likely anyone can get a solo 51% of the hashrate on a network to 'change the governance rules) As time goes on and future halvings (the rewards given out are halved) the amount of crypto mined decreases (by half) and presumably the value of each coin increases, as supply/demand/scarcity. Will it get to a point of where it's not profitable? Yes probably. That's why the push for more efficient ways of doing it are an ever increasing need. The only thing that can 'crash' in crypto is the traded value of it, and over time crypto valuates really really well. As more gets 'lost' 'forgotten' or just being held by everyone, the value of a coin will almost always go up. It's why people are using crypto as a store of value. As time goes on the value increases. Where as with fiat and this BBRRRRRR money printing going on, the value of saved money is going down.