Yes. I agree. Maybe the best option is choosing some coin with great tech/team and hold it long time.
This may happen. But I think it's a long time to happen and if this happens we're probably already adults. Before this happens I think it is necessary to fully adopt the crypto that is used in simple transactions such as buying groceries, shopping. And in other words it's easy for everyone to use.
Therefore crypto currency movement was really unpredictable due to some problem encountered by the digital industry, but it was manageable by the management of crypto currency society.