I think no one should convince you to buy bitcoin, it's just wrong.
Do your own investigation and understand what bitcoin is, what it is for, what its meaning is. After you have enough information, you will be able to decide for yourself whether to buy bitcoin or not.
I also heard about bitcoin from my friend and decided to read about it, learn more. After a while, I bought bitcoin and I still keep it in my ownr wallet and accumulate. For me, bitcoin is confidence in the future.