I'm very new to bitcoins and don't understand how it all works. I should have found out more before getting involved. I had someone working with me to help open my wallet.dat that is corrupted but he could only do so much. I've been told there is still a possibility that my coins can be retrieved with the help of a core Bitcoin developer I know that the BTree structure is corrupted and that the Berkeley tools are unable to read it. I am offering 7 bitcoins for whoever can help.

For infrequent and amateur use should I use multibit or bitcoin qt? Also, why does it take days to synchronize bitcoin qt whereas multibit happen in a matter of seconds?

I'm very new to bitcoins and don't understand how it all works. I should have found out more before getting involved. I had someone working with me to help open my wallet.dat that is corrupted but he could only do so much. I've been told there is still a possibility that my coins can be retrieves with the help of a core Bitcoin developer I know that the BTree structure is corrupted and that the Berkeley tools are unable to read it.

I'd really appreciate any and all help! Thanks in advance!