I think the best way to shut up bitcoin haters is to prove that you are earning on bitcoin. When I was starting at bitcoin, there are a lot of negative comments from my friends and they were always telling me to be cautious. Only a few of them supported me and those people are investing on bitcoin as well. They are earning enough money for their needs and they never regret investing on bitcoin even if the price goes up and down.
Dont you want to shut their mouth with fist?lol
For me?i dont care about their sentiments because if youre a real believer of bitcoin,this haters wont affect you daily routine and focus on what you are doing herin cryptocurrency..and besides if you dont give them a damn,they will stop talkinh and will just get tired of what they are throwing towards bitcoin.
Sometimes those haters also helps bitcoin for promotional because the more they say negative,the morpeople get interested in crypto