Obviously you have too many followers, and I'm curious if 50% of them are real, your tweets doesn't have any retweets even likes which is really doubtful for having 48,000+ followers.
Mind showing your twitter's impressions per week, to attract your future clients.
They are not too many, I have grown the account since beginning of 2013 all manually and naturally. So chance is that the biggest crowd has an interest in cryptocurrencies or is actively working with it.
You may scroll down all the way to the bottom and still find a good densitiy of cryptorelated accounts.
Never purchased or botted. Tweets that have a lot of rt's and likes often are sponsored, it also depends on the content.
This month has over 70,000 impressions but it really depends on how much tweets go out. In more active months I reach 150,000. Of those you will see 0.8% engagement.
All tweets get over 350 impressions, good ones over 1,000.
Good luck. 
