The higher BTC goes, the more people will get awareness of crypto currency. Just 3 years ago when BTC touched $19000, i saw more people getting interested in investing. I dont see people losing interest in investing in crypto when BTC increases with time.
Not losing interest, it's just low new buyers. The only thing that make btc have low new buyers when the price high is, people always thinking it's too late to enter the market. They always thinking the price is too high and waiting for dropping price. It's normal.