I make use of Bitcoin as an investment I do not spend my Bitcoin because I think that it is not smart to be spending them.
The value of the Bitcoin can go up in the future and I am waiting for that to happen.
Spending bitcoin isn't smart? Didn't you know that spending bitcoin even for occasional basis is a big help for this currency to become a strong one. Circulation of coins in the market is a must.
Also it's not a mistake if you really want to spend them for general purposes or important matters.