You are right for now, but btc has a hard limit of 21 million coins. Half the reason mining is becoming less and and less effective, is because the closer we get to those 21 million, the less the network rewards mining (also harder hashes). The network also destroys currency via transaction fees.

NANO also has a fixed amount (but they're all already in circulation), no transaction fee, and is superior to btc in pretty much everything except the size of the bubble