That's seven long years later. There will be a lot of questions here. Have you not heard of Bitcoin from that particular moment on? Did you not hear even one particular news about Bitcoin in 2016 or even in 2015? Bitcoin was already popular during those years. Where were you back then? If the site is still in existence until now, try to recover your account. And then you will take the next steps from there.
Maybe that time his busy or finding any investment that he can earn more profit. that time back in 7 years. knowledgable will only knew that bitcoin is popular. curious users are the lucky one's that find out that bitcoin will make them richer. those years are too long to remember, if you own it on the site your bitcoin has been taken. so remembering your recovery password etc. is nothing to do. just accumulate more because it's not too late to have more bitcoin. it is the only thing to recover your emotions and take away your repentance.