Ethereum

1. Ethereum as a utility is cool and there's a lot of good hearted sounding advice on replying here

2. This a a classic scam. Do not do this. This is a common con job that works by the con artist having you interact with a legitimate looking interface after leading you on for a long time. They promise you a lot of money, often more than market value, but you can only accept payments through "x,y,z vendor" but you have to set up an account. They will have you verify your account by depositing a small amount that they will refund after it's cleared.

Good channel on how to avoid scams is scambaiter on YouTube

https://artsartistsartwork.com/protect-yourself-avoid-nft-scams-from-random-invitations/