can twiends filter all the followers to based on cryptocurrency related account?...
Of course, you can set filters and adjust your interest correctly to cryptocurrencies, ETH, BTC, ICO and many more. I think you can choose up to six different once.
Additionally, you can follow and be followed by people with this same interest which will be cryptocurrencies if setup correctly.
I advise you to read the first post carefully because everything is described there in details.