I replied to his message just out of curiosity. Because I wanted to see it till the last step. But unfortunately I couldn't proceed further because he asked me to invest. Still, I wanted to know about the next step from him.
You still have to be careful by the way because most at times, people get scammed simply because they want to find out how the scam works and before you know it, you've already fallen victim.
Did you search for that coin in Bitget? Did you find it in either Binance or Bitget? If you don't find it in either exchange, it's definitely a scam because he will probably give you unknown exchange(s) where you can find the coin and that's where the scam will play out.
The best precaution is to stop entertaining such discussion by all means. Unless you are the one that initiate the conversation, every discussion about crypto and trading that comes from strangers is likely to be a scam.