5Ls are nice, but the issue with them is that each one is a little lottery ticket. If the name has no real meaning and no existing potential end user, you're playing a waiting game, hoping someone will come along and like it. A solid (maybe optimistic) expectation would be to sell 1 or 2 percent of your 5L portfolio per year, which means you really need to be buying and selling them at the right price to not only break even, but make profit from them.
Some users on here make the model work quite well. Perhaps
@JimJammy would be willing to jump on and spread some wisdom...
The best model I've seen is to invest heavily in good, solid, pronounceable names, and give them a lot of exposure. If you don't own a portfolio site that gets a lot of traffic, that means hoping they get accepted at a marketplace like BrandBucket where they can get a lot of eyeballs on them from real buyers, and can sell for 100 to 300 times their purchase price. And for the ones that don't get accepted, you put them up on every major aftermarket site with a reasonable BIN.
5Ls are not a fast path to easy money. I only own a few because I refuse to spend more than GD closeout prices on them, and I'm picky enough that I like to be able to derive meaning from the name without having to think too hard.
I've never had a sniff on my meagre collection of 5Ls, but I like them enough to hold them for a while:
Cabya
OMGok
Nomry
Adzow
Fisqa
Zazya (might drop this one)