Well, Yes of course you can store your tokens as much as you want in your wallet. Even if nothing happened. The keys are not lost, etc. I Have friends who buy Bitcoin and put it in the Bank until 20130 year when children will be 18 years, they will get their one bitcoin each.
I dont really think that store the altcoin in wallet is worth since when the price hit our expecting price, we should send it again to exchange then sell it. Better to store in exchange and set our price goal so it will automatically executed by system.