Yes. I see this particular question asked around on a regular basis and my answer is always 'Yes' since I am a firm believer that Bitcoin and the cryptocurrency market on the whole are here to stay and will not replace FIAT, but will serve as alternate payment methods in our daily lives. The shitcoins will disappear for sure, but the legit cryptocurrencies will survive no matter what although their values will fluctuate a lot.
True indeed. Crypto currencies will be used as alternate payment method and as an asset, but will never replace FIAT. The volatility of the crypto currencies and the fact that it is based on decentralized platform will limit its possibility of being used as a currency in a country. It will be hard to charge tax and find black money if crypto currencies start to be used as currency. Although only coins with real world applications and use cases will stay in the end and the rest will disappear.