There is a great opportunity for me to make more than 10 bitcoin throughout 2015, but that is a past I don't want to remember. Now everything is fine for me although actually I can no longer afford those 10 bitcoin in just one transaction, I mean only because they are already more expensive.

Regarding the amount, I think it should be kept secret because of course this is a matter of privacy. But I have it just in case in case I can pay for coffee with bitcoin in future.