Where the legal money use case really shines is in micro transactions. If the amount you want to send is really low it makes a difference if your fee is 30 cent

Where the legal money use case really shines is in micro transactions. If the amount you want to send is really low it makes a difference if your fee is 30 cents on paypal vs a fraction of a cent with bch, bsv, or ltc. The problem is that it is very hard to monetize apps with micropayments: you need a massive user base because you only earn a fraction of each micropayment. It is hard to convince a massive user base to go through the hassle of obtaining Bitcoin. I do not want to discourage the use of Bitcoin for that, I think there will be awesome businesses built on micropayments and payments in general. I just want to point out that there is an opportunity to use Bitcoin to make application development faster and cheaper.