Thank you for the answers. I don't mind to have the BTC instead of USD. I think, nowadays, it is going to grow up a little bit each day. The last 10 days the price has grow up 20$... I will search for a secure wallet...

The other question is: how to publicize it? I mean... are there any websites of business using BTC who could help me? Do you think the BTC could attract some people?

Thank you