But if actually, someone did help you to create a bitcoin wallet, then I advice you never to use that wallet, learn how to create one yourself, and only use wallets you created yourself, never trust your wallet keys or seed phrase with any third party, be it your brother or sister.
I beg to differ on this. While I know you're generic in that comment, I also have read others toe that line of thought, but that doesn't apply in all cases. We should know that there are people who don't give a hoot about the seedphrase of others. I've created several wallets for people without even having a peep into what they've there. Some I activated physically in their presence while others I did online for, several distance apart, and I never bothered to ask. I only made sure they knew what to copy and from where. I've bought Bitcoin and other cryptos for people without owing or having access to their wallets after creating those wallets for them. Doing that and making sure they don't reveal their seedphrases to me is my own way of instilling in them that thought process of
Not Ever Revealing their seedphrase to anyone, no matter who. "If as a mentor I didn't allow you reveal to me, what else will make you reveal to anyone else?" That's the way I put it to them.