Holding Bitcoins in fact means having an open market position - value of your wallet strictly depends on market fluctuations. While I think, that saving some BTC for long term is quite reasonable, it's still risky and our predictions about going to the moon are just bagholders wishes 
Those who lives will see for sure. We all just need to have trust in BTC. If people keeps the trust we will continue to grow, no doubt. Best Regards,