Todays bitcoin market is not like these past few years because ethereum market now is starting to bloom. I can say that bitcoin is starting also to overtake by ethereum because bitcoin blockchain is slow unlike ethereum blockchain that is seconds only to confirm a transaction.
Keep dreaming there are several reasons why ethereum despite being a very good project is never going to surpass bitcoin, to begin with the main use of bitcoin is as a currency while the main use of ethereum is as a way for bad developers to put useless coins in the market, second the issues your talking about will be resolved by the lightning network and finally the issue of immutability of ethereum is great since we know they are not going to respect that principle of cryptocurrencies.
