can they be hacked, and the funds stolen, do they have a special wallet where they keep all the btc ? how do they work exactly?

can they suddenly decide to hold your btc, or restrict you or prevent you from sending or receiving bitcoin ? if you don't provide id or for whatever reason ?

do you own your btc (menmonic) with them or is it in their control?

thanks

how do u sell large stach of btc in a country where it's illegal
?
any ideas

Hi, any debit cards that work outside EU ?

I need help , please
i received a transaction , and it is still unconfirmed after 12 hours
it says  (Medium Priority) this transaction has a very small output and is non standard

what can i do here , can i send it to another wallet
or  am i simply screwed  

does it make any difference if my paypal is unverified , and i send the money which comes from my pp balance as a gift ?
does that help protect the bitcoin vendor in any way ?
i am asking this because i want to buy btc and it's hard for us newbies
thanks

i need 20$ btc , and i have paypal
only trusted members please , we can use escrow
I've never done this before , so if everything goes smoothly i am looking to buy a lot more btc
pm if you are interested