I'm having trouble understanding this part:
In total 50 dollars. It went up to 225 dollars but finally I can not withdraw my funds.
how did $50 become $220? is there any high return scheme in Bitmart? are you talking about this site
https://www.bitmart.com because this legitimate site is for Buy & Sell Crypto, I'm not seeing any investment options, are you sure it's the same site I put the link you are using