I hope you've understood well the things that are involved in this before you concluded on this your action, know that everything that has advantage cab also have as little disadvantages or risk associated, it's good to recommend bitcoin for someone to invest with but it's foolishness to rush into investing with having the an understanding of the whole process involved, i believed you don't only received the advise alone but you've also learnt alot about bitcoin before investing, such as the bitcoin price, buying and selling otherwise known as trading, long term investment, buying pattern, why you should hodl, bitcoin wallets, bitcoin volatility and so on.
It's never a bar id a to use a centralized exchange like Binance to buy but it very unprofessional and wrong to have your bitcoin stored on it, because centralized exchanges have in custody your wallet keys, this makes it more preferable to use a decentralized wallet or a cold storage for your asset to feels secured.