While these are definitely interesting and somewhat visually appealing, they may have more value as a collectible than as a commercially-viable domain name. I think the value will increase as time goes by, but you may need to wait a couple of years before you see any real value...
There are still many names available in actual languages that are good, solid regs, plus, if you are willing to wait a little longer (like with your symbols), there are many decent single-word domains left in some of the Indic languages... Also, you casn still get some downright steals on great IDN domains in the aftermarket. I would pursue those routes if you are interested in regging more IDNs. Just my opinion/advice.
With all that said, your symbols are interesting. Do they get any traffic?