Dating scammer. From tinder or another dating platform. They contact you asking what's up or telegram account them starting friendly conversation after that they have nice opportunities to earn a lot from Bitcoin trading. Taking you to the platform. Helping you invest money there . When you invest your money. They also help earn fake profit. Even lending you little money to invest there ( definitely it's my money)After that when you want to withdraw they ask for tax from profit. When you don't want to pay tax . They freeze your account even if you don't have profit and your dating scammer disappears.
It's a scammer platform, don't trust them.
Seek legal advice.