Basically, BTC is a cryptocurrency, "currency" meaning it is intended to be used to purchase something. But since people saw it grew in value dramatically and drastically through the years, they see it more as an asset or investment that will bring fortune or luck in the future. Honestly speaking, I also see BTC that way. I prefer hoarding and trading it than paying bills with it. I have seen that its supply could go scarce, meaning it could be as precious as gold. Actually, it's more expensive than gold now. But the sad truth is since it is highly volatile and is not physical, it could burst out any time soon. So to be safe, don't invest in BTC more than you are willing to lose, otherwise you'll go insane when it burst out like a bubble.