XEM is notorious for a hack, but the way it was cleaned up was expert-level. The NEM network is building support in the Australian and Southeast Asian markets. It has a strong community that supports it because of how great the team has been so far. This blockchain is on the level of Ethereum or NEO/GAS and uses Java-based API calls to connect to other networks. The interoperability, ease of use, and solid support makes this a great project.