I think Bitcoin is your best choice at the moment.
At the moment? I wouldn't be so sure about that. The gold market seems much more better right now and it would be a pretty nice investment too. Yes, bitcoins are attractive and exciting but lets be realistic, gold is fucking gold. Its beautiful and it will always be precious unless we develop gold extracting tech which removes gold from sea water.
Gold is always a safe haven, but it's not very exciting unless you are already rich. Is there something better than gold to keep your wealth safe? nope. It's gold the best investment long term to become rich as a non rich person? nope. Is Bitcoin more risky than gold? Yes. Is Bitcoin a way better investment to become rich than gold? Yes.