It is true that bitcoin is not used for mode of payment but as investment but it is what the decentralization and freedom is all about, we get to choose what we want to do with our money with fiat it's what government wants even though we worked and earned it. Also we lack the infrastructure to use bitcoin as currency which may take a while for the transition to happen until that accumulation is the best way to ensure better future not just in terms of returns but also to power shift from centralized banks to the individuals.
Bitcoin is used as a mode of payment but the investment aspect supercedes the payment aspect that's why each time Bitcoin is been discussed, the investment aspect take about 98% of discussion while 2% goes to the payment aspect or it's not spoke about, they just talk about the institutional investors and how bullish they are with Bitcoin and there is nothing absolutely bad about it. If not for the value, I don't Bitcoin will be talk about like they do now.
If Satoshi that crested Bitcoin is around and watches everything that goes around Bitcoin, even if his mission isn't what he thinks happen today, I'm very sure he is going to allow Bitcoin be what it's today, that was the purpose of decentralization, you make people decide what they want to do with their Bitcoin and without this purpose I'm not sure person like Donald Trump will be able to.win his election
it's because they of the store of value he said he will be given us Bitcoin reserve perhaps in the future. 