It's well know that the Crypto-Bros are everything: hivemind, lazy, and all are a bunch of fucking thieves.
Recently they are more active and dangerous than ever. recently they stolen various artists accounts on Twitter (the mayor targets) to promote NFT/Blockchain/Crypto bullshit. then you say: No shit, Sherlock! yeah, but this time they are desperate, they are now attacking every type of account, small ones included, so I'm here to help you to protect your account and other ones as well and this warning is for everyone, so spread it like fire!
First off: you need to setup a 2-Step Authentication on your Twitter account via an application, Google Authenticator or Authy (the one i use), both will work. go to Settings > Security and account access > Security > set Two-Steps Authentication.
The next step will be remove your account associated with your account (excepting the E-Mail and Payment stuffs, the last one may depend of the service you're using) go to Settings > Security and account access > Apps and sessions > Connected apps and revoke all the apps.
And the last one is changing the password to a stronger one, small changes can do big ones.
Oh yeah, locking your account will not work due to a exploit on the Twitter's API which can bypass the 2-Pass Authentication so keep the eyes peeled for sussy wussy stuffs.
I hope i can help.