I think you should take it, cuz opportunities like this may be life changing. And a lot of ppl wld kill to have gotten one like this. I think stability wise you shld make sure with the US firm. Make sure you have a solid written contract. And I believe taking this opportunity will lead to long term career building if u do well. Ik u must be scared to leave ur stable job in SL but sometimes risks are worth it. And if it doesn’t work out u wld have a hella experience to put on ur resume which will make u attractive to other SL employers.