Crypto is here to stay.
In the future maybe become as alternative for cash. Many think it will become the alternative for digital payment, yes... but maybe only for cash transactions that are no longer possible in the future? In Germany, there are a few banks that no longer offer cash in the stations. If more banks follow, where will you get the Cash over the next few years? From private sales and how do you turn cash into digital? Bitcoin is an alternative.
Bitcoin will never be an alternative. What about CBDC, did you miss it? Some developed countries may be implementing a cashless financial system but will instead be CBDC or a government-created digital currency, never bitcoin. How does a decentralized currency get accepted by the government? how can a highly volatile asset become a currency? Bitcoin will be an alternative to fiat unless it is regulated and it becomes stable, but that will never happen.