I think in 5 years there will be arround 100 000 tokens and different altcoins, but BTC will be still number one. I believe it has still great potential
You know before some years from now the value of bitcoin was consider negligible and people dont even trust in bitcoin but now people do anything to get bitcoin and invest in bitcoin just like that after some years price of bitcoin will increase a lot and will become the most famous cryptocurrency in the whole world.