Unlike other commodities, Bitcoin's value is mostly subjective and thus directly related to the number of Bitcoin users.Twitter's implementation of a Bitcoin-based tipping system exposes its 400M users to Bitcoin adoption.The Bitcoin-based tipping system looks to solve a couple of significant problems in the current tipping ecosystem and thus will likely drive further Bitcoin implementation.It would be irresponsible for Twitter to not buy Bitcoin following this development, and thus we should see this action as a bullish one for Bitcoin.I suggest a three-to-five month long position on Bitcoin while monitoring this development.