Aside from that if you do register a domain you see development value in and nobody wants it there is nothing to stop you developing it yourself, generating traffic to the site, and monetising it. That puts you in a better position to sell it later if you want or keep it as part of a portfolio. Avoid trademarks, new gtld extensions, and typo/misspelling/hack domains - eg d0ma1n.com or carinshurance.com. Good luck.