Yes, I encrypt my laptop drives. Laptops are incredibly likely to get left behind somewhere or stolen, so it's super critical to make sure you aren't keeping the sole copy of important data on it and that the data that is on it is encrypted.

Performance impact is pretty negligible on an SSD with most modern operating systems.

EDIT: Another thing to be aware of, built-in hardware encryption on a drive is not necessarily adequate, and some encryption schemes will default to just using the hard drive's own encryption if available (such as BitLocker): https://portal.msrc.microsoft.com/en-US/security-guidance/ad...

You want to make sure you're using software encryption from your OS.