Yeah LTC & ETH are definitely very safe & very stable, with lots of promise/room for upwards growth. ETH's founder Vitalik Buterin is, well...let's just say calling him a genius would do him a massive injustice as its QUITE an understatement. Check this out this quick 4-min. vid to have your mind blown:

As a fellow investor/entrepreneur, I'm glad to hear you've diversified into crypto as its both an exciting & lucrative space :)

Regarding BTC, there's a lot of financial analysts predicting its growth to hit $10,000 in the coming months while some even claim it can easily hit the $250,000 mark at some point! I remember back in 2013 when it peaked at $1,200 a lot of people were saying it's probably to expensive to get in at the point, but these days people would KILL to buy at that price haha! Definitely buy in on a pullback because in my mind, Bitcoin is also still very promising as well (just like LTC & ETH)!!!

Safe travels, and definitely ping me when you reach BKK once again :)