What other options are there?
Gold? - gets confiscated at customs (the typical $10,000 allowance is getting smaller every day)
Other digital currencies - centralised. Remember eGold? Hmm...
So is Bitcoin is the only option? Even if it's thought to be going down... it still has utility.
No one has created a decentralized digital system of highly marketable, directly serviceable goods, yet. I suspect one will be created soon.