Ethereum is one of the most robust projects on the market, no doubt, but there are hundreds of tokens that use the ethereum infrastructure, and most of them are garbage. I think this is damaging the reputation of the ethereum. So it will be more accurate to implement serious controls. Each token should not be easily included in this platform. Ethereum will be much stronger in the future if it provides improvement in these issues. By the way, I don't think it's possible to replace bitcoin, at least in the short run. Bitcoin will take advantage of being the first coin and will always be the first.