The future of crypto currencies is unknown, but it is a new generation of Money which is already replacing the paper currency, especially Bitcoin been the most popular and successful among other crypto currencies so far, bitcoiners need to know that currently Bitcoin is trading low from its all time high, Bitcoin should not be viewed as a short term Investment, but should be seeing as a long term life changing investment due to its liquidity and high returns when trading high.
Bitcoin is a digital currency that has come to stay, as long as the internet stays , most persons that didn't believe in Bitcoin 10years ago regretted it, that will be also be the case for people who don't be in it now come 2034.so think positively take the risk and Investment in Bitcoin today.
Bitcoin has not replaced paper money or Fiat, because globally fiat transactions still dominate, even for online transactions Bitcoin is not yet the main choice because there are still other types of online payments that are considered safer, faster and also have lower transaction costs, but we don't know for certain developments in the future, maybe Bitcoin will be the main choice but as payment for online transactions because fiat will still be the choice for offline transactions.
In my opinion, currently more people are focusing on price rather than the main purpose of making it as a means of payment, especially at this time which is predicted to soon enter a bullish period, Bitcoin will become increasingly famous but only about price because that is what is more often reported by the media unless people find out about technology and other things about Bitcoin.