a better option is to invest directly, not through others. you can buy bitcoin with fiat. Keep it in your wallet and then wait until you see a profit. because the bitcoin is real and promising, not a scam.
I agree in your opinion, bitcoin is not scam as you think cause bitcoin is good investment for future. If you want to buy bitcoin and invest make sure it is legit make a search if they scam or not for your own . Do not trust anyone to offer you to invest cause scammers are always there .