Very strong suggestion of 'money safety' - I'd consider approaching small-med sized investment firms. Eg: safe, loss-less investments.
I think this has much more chance than to sell it inferring any computer-tech connotation... since 'lossy' and 'lossless' compression are well-known, then it follows that if lossless, as a tech term, had any real value as a domain name... there are a LOT of techies out there who would have nailed it, IMO, since it's so well known.
HOWEVER: there's always the big however... Maybe farm around for a few more comments on this, even from tech-sites. I'm not tech enough to know much about that angle... since it is a common term, I also wouldn't be surprised if you did have something here.