Yes, I also think it's enough because even if it's not yet the entire bitcoin in circulation and yet there are lots of money using bitcoin so I'd say it is enough. Being a holder of bitcoin didn't even have to be at least 1 bitcoin because you can even see some people discussing theg they don't have 1 bitcoin but they do have some bitcoin which I can say they they prefer not to disclose the exact amount for privacy concerns. If bitcoin can be made to increase the total supply then it can crash or decrease its price or lose its value.
We will still get to a point where 1 sat will become very valuable that one wouldn't need to own 1BTC to feel satisfied about owning BTC. Right right, 1BTC is already alot, so we can imagine already what the future will look like. Bitcoin's 21 million supply is perfect for bitcoin to remain a store of value. Increasing Bitcoin's value so it will reach everyone sounds absurd 
, it's not going to happen anyway because Satoshi knows better; Bitcoin is decentralized, so it cannot be altered.