I am thinking that if the bitcoin continue to go up to $100,000 and above. it will be expensive for the poor people to invest.
What do you mean?
Bitcoin can be bought in a small amount of money, too. We don't need to buy 1 BTC if we don't have that money.
Check on exchanges, there are minimum purchases for Bitcoin.
Actually, this is not a good way of thinking. Because Bitcoin is never going to be special to rich people in the future.
Bitcoin is good for people who are open-minded, have a good strategy, good analysis, good learning process, and also good for someone who has understood about Bitcoin itself. So, it doesn't mean only good for rich people.
Everybody can own Bitcoin.