IMO, many kids gamble online at the online betting site. no matter what firewall you set for them, kids are smarter these days and will cross them easily.
Trading is a game of risk sometime you lose some time you win it. Learn from mistakes and see what you have done wrong and more ahead there's nothing you can do
Using bot can be profitable but They run on a very basic code check charts and make a prediction which can go wrong and if it go wrong it won't learn from its mistake where you will and learn better which can bring more profit
I suggest you buy from some good reputed exchange or from localbitcoin.It is risky to buy from anyone without using escrow or unless you know him or personally meet with him.
Yeah, he is right, buy from some reputated website like coinbase, localbitcoin etc. What mode of payment you using?