How do I use my eCash?

I'm curious about how to effectively utilize my eCash holdings. Could you elaborate on the various ways I can spend, invest, or otherwise leverage my digital currency? Are there specific platforms or merchants that accept eCash? What are the transaction fees and processing times typically associated with eCash transactions? Also, I'm wondering if there are any tax implications or regulations I should be aware of when using eCash. Could you provide me with some practical tips on how to safely store and manage my eCash, as well as potential risks I should look out for? Your insights would be greatly appreciated.