Lexikat's sentiment signals are accurate enough to put money on. For the past few months we have been trading cryptocurrencies using our sentiment data. You can find the signals we use here. If you'd like more info, or to try to build your own trading strategy, we've explained how we did it here.
In Ethereum back-testing over the past year, with starting stake of $10,000 for the past year or so we ended up with $27,140. (For comparison, over the same period a buy-and-hold strategy would have left us with just $4,162.)