Right now the market of cryptocurrency is going through a lot of ups and downs. We should wait some time now. As soon as bitcoin becomes stable at a higher level, the whole market will become very good and good at that time. There will be an opportunity for us to buy Bitcoin or Altcoin.
Bitcoin price will be like that IMO, there is no stable price even when bitcoin has mined in the future. That is not a benchmark for some merchant to accept bitcoin. I think that is just about the knowledge of the merchant itself. Bitcoin is an innovation for transaction, if they only use money fiat as a transaction tool so I'll predict their market is very limited.
Because when they accept bitcoin as payment system you will see many people out there will consider to buy some stuff to them especially for customer in different country. They don't have any reason to concern about fee per transaction, they can use lightning network as solution to avoid high fee per transaction.
Here are some compenies who have decided to accept bitcoin as a mean of transaction
https://bitcointalk.org/index.php?topic=3097705.0