I fear that a steam account cant be secured properly. I mean you change username and email but im not sure if there arent other ways to regain access to the account. Like some old phone number or something like that that steam staff might see still as valid.

So what does have to be checked so that the account is really safe and cant be taken away?

does it have a BIN option?
and how high would it be?

does it have a BIN option?
and how high would it be?

How old is the account?
When are the games purchased?
No VAC or any other restrictions?

can you pm me your csgo inventory?
do you have pro equidment?

hmm.  I'm interested because of the CSGO, no bans whatsoever, correct?  Are you willing to include everything, from all the inventory items to the email you are using?  This is to insure you won't be able to claim the account back.