For me bitcoin is best in online investment. So i am using it in investment.
Secondly, i am spending the bitcoin in most of the ways, like i am always paying my bills with bitcoins, online shopping, recently i buy a new currency from bitcoins.
Third, i sell the bitcoins on most of the sites are here where i can sell it easily.
Last, when i started the career with bitcoin, so i earned it even in this time i never buy the bitcoins, now i have a lot of bitcoins but thats all i earn it from investment and in signature campaign.