Linux can handle BitLocker & Secure Boot just fine. The problem with dual booting in that configuration is rather that every time Linux updates the boot loader, Windows will freak out and stop booting until you enter the recovery key for BitLocker. This can be prevented by first booting into Windows to disable BitLocker until the next reboot and then installing the Linux updates, but in practice I find that I forget about it all the time with my dual-boot laptop (which spends most of its time booted into Linux).