I almost always prefer TLD other than .com due to them being mostly squatted. My rule when choosing a domain name is the following:

  1. If it is a country old (ccTLD), I make sure to inform myself on the current political situation in the said country.

  2. If it is a gTLD (non- .com, .net, ..., and non-ccTLD), then I limit myself to registrars I trust, e.g. Google's Charlestown.

In general, it should be ok, you just need to inform yourself on the registrar or the country that own the registrar, to avoid issues where the extension is dropped.

freenom just erased my dns records...first time it happens...in the meantime i have no .tk web page