Bitcoin is viewed as a “reserve asset” or store of value that have top market Cap and slow network that have high fees.
Tokenizing is one of the solutions for anyone who wants to use Bitcoin and make fast payments.
we are seeing a growth in the number of BTC on Ethereum ¬ 180K BTC
When you "tokenize" bitcoin, you need to trust that the emitter really has 1:1 BTC for each token. This is the same problem as with tether and other stable coins.
When you hold WBTC, or whatever token, you do not own btc anymore: You own a promise that the emitter will pay you back 1 BTC when you request: if they have it.
It is not the same. It has some risks, and it doesn't solve the problem you are referring to.
What makes transactions cheap and fast are layer 2 solutions: Lightning network.