Is Crypto currency a bubble?

I just don't see how this uptrend can last! I love the idea and think it is possible that it can be the world's new money standard. But there are so many and there is no way the government is going to let a currency be decentralized with no say so in the matter. I see this as there way of getting very rich off of it right now and seeing how it works for our economies. Plus I'm sure there about to come out with some kind of fedcoin. Plus they say that they are only so many Bitcoins that can be mined and then there will never be anymore. That is actually not true. Plus for those that don't understand and want nothing to do with Bitcoin. What happens when there are no more left. Do you think people are just going to give there money away or does that mean bad things for the one's left behind. I think honestly everyone better take these profits while they are still available. Food for thought!