1. The "Private Secure Untraceable" is a rip off of Monero (albeit in a different order). I don't like that. Also, too much descriptive content for a logo, even an extended version with the name (most logos can be used with or without the name). Take look at those successful logos above. How many of them have descriptive content as part of the logo itself? Zero.
2. The 'a' part of the logo bothers me. I doesn't look like an 'a' and the symmetry is poor. Again look at the logos above. A few have broken symmetry, such as Brooks Brothers, but it is very carefully done to remain subtle. The broken symmetry here is very jarring to me, in addition to just not looking like an 'a'. Either go completely abstract shape-wise (Rolex, Mercedes Benz, etc.) or stay closer to the literal letters presented in a stylized manner (Rolls Royce). Avoid the middle.
3. I'm still not sold on the circle. I suspect the concept could be remolded into a more distinctive shape such a diamond. EDIT: I do think the yin-yang theme works, possibly (though not sure of the actual purpose of the symbolism here really). If so then maybe the circle should stay.
It also is barely distinguishable as an "ae" when it is shrunk - it looks like a bunch of squiggly lines (even to me and I'm looking for the "ae").
This is what I said earlier. No text will be useful at 16px. At that size you working with shape and color.
I just used the wording for a font type concept. It's the font that I would pair with future work on websites, ads, etc. So why did I choose those three words? Well, it's how Aeon is currently described on our reddit page. "AEON is a private, secure, untraceable currency."
I'll try some different fonts and ideas based on your feedback. If they don't work out, no hard feelings. I'm just trying to contribute.