My question is who buys Bitcoin at that price..?
Can you imagine someone asking a similar question 3-4 years ago? "Who buys Bitcoin at $50k?" The value of one bitcoin was well below <$10k back then. But here we are now. (not to mention 2021/22). The point is, there is always someone buying bitcoin, just as there is always someone selling it. No matter the price.
Will the value of Bitcoin keep increasing after then?
It is impossible to predict the future, but most likely yes. As long as there is new demand, the price is likely to rise due to limited supply.