Lots of good advice is this article. Snapshot is below:
How long do I have to hold this coin to start seeing major movement in the development?
SAFEX - There is a wallet already, and shockingly, the alpha blockchain is being developed right now and is planned for release in this 4th quarter. This is huge.
SIGT - Their version of a Marketplace and web wallets(web wallet still says coming soon, but is labeled as beta) are in beta already, the signatum pay and signatum exchanges I was unable to find more information about. Marketplace seemed to have major disadvantages for the coin itself. Listing fee is too low at .15% ( industry average is upwards of 6%, there is zero reason to cut all your profits like that and playing the walmart game always concerns me.) in addition to that, the buyer pays for it. I can't seem to find any barrier for entry to be a seller.
ODN - It is too unclear what major developments are in the pipeline. We know there's a messenger, outside of that the future is unannounced and could range from a messenger only coin - to taking us to the moon. We simply have no idea.
Thanks! Searched here for ODN as I believe it will be big and found your post. I hope SIGT pops...I am holding some of it.
Signatum is being traded for a long time now. This POS coin along with Denarius had a number of followers but they never took off. I don't think such coins have even a future.