There are a lot of alt coins that have a great idea. If they can't execute and create a product in the next year, it is likely the price for those coins goes to 0.
That's not necessary. Look at Dogecoin, it's one of the oldest coins in the business, it has no purpose except cheap transactions yet it still has some great value. There is no excellent project in the market yet but there are various good projects. I don't expect them to go zero. Bitcoin also still the ruler of the market. Staying in Bitcoin is safe and feels good.