It is not a bad idea, but you should be careful about freezing your money. Because you can not make money by being passive by putting money into altcoins or bitcoin. It is very dangerous for you.
The next five years the financial market is developing. Maybe we anticipate being late, so we don't enjoy. I took the example of five years ago what is the price of bitcoin and what is the price of bitcoin now? From this it can be concluded that the next five years can be like the example above. Indeed, it sounds speculative, but the speed of digital currency spreading throughout the world makes the governments of each country make regulations that actually increase bitcoin's popularity. So while there is time (and there is money) invest in bitcoin, or 5 years later you will regret it.