Will I be rich soon ?
Smart purchase imo
Just don't forget your passwords lol and don't leave them with
any third party exchange or wallet services for any reason
I got them on block chain ? Are they safe ?
Do you mean on Blockchain.info?
yes
You need to have a very good password, and 2 factor authentication (if they offer it? I don't use their wallet). Otherwise your coins will be gone in a few hours not days or months. You can be certain that there will be bots attempting to hack your password, if it's crappy or moderately crappy like foxcon66, your coins are not safe.