There's some site i want to sign up with but i don't want to keep giving my card number. I've already done it with many sites for online shopping.

My bank has a thing where you can create one time credit card numbers.. so the real  one is not given to the sites where you purchase.

So i wanted to sign up for an online account at my bank so that i can do that...but the whole online banking thing. i dont know....some people say it's not safe.

is  it safe or  not?