By definition of an Asset, it is anything owned or controlled that can bring future economic benefits. The question now is that does bitcoin falls iinto this category the answer is yes. Many people hold bitcoin with the intention tthat the price will rise in the future so that they can sell it to make profit which represents future benefits. It is also hold as a means for exchange or value to buy other coins on the exchanges

 :I'm also here to learn, what I can deduced from what most of the people have replied so far it means Cold storage or any wallet you can have access to its private key will be good to go