In this crypto investor's opinion, BTC is actually useless, both as a currency and as an investment vehicle: price is too volatile for the former use case, upwards price action relies on more investors piling in for the latter use case (which is a ponzi scheme by definition).

That said, blockchain technology is not useless. dApps and wallet-based money (think stablecoins trading seamlessly and instantly on the blockchain) are the next internet. Crypto is held back by BTC which has no real use case and survives on name recognition and collective desire not to give up on a ponzi (and admit to losing money). When smart contrac platforms push past BTC and we see more and more crypto-native companies and commerce, that's when crypto will really shine.