]If I were an investing guitarist I would put the money in the stock market and pray hard that I made the right choice.
If I am just a guitarist I will put my money in a guitar that wins my heart, enjoy it and pray real hard that I made the right choice. And if I didn't, oh well, I could have done worse things like putting it in the stock market.
Just enjoy the guitar that you can afford and because you want it. If you really wish to play the game try to spot rising young stars. What they choose to play will be the next hot gotta-have-that guitar. It may just may be some young star from the PRC choosing to play an instrument made by a luthier from the PRC. I'd take a serious look at PRC luthiers as an investment strategy. Bream-Romanillos, Williams-Smallman, Russell-Damman, Barrueco-Ruck, Fisk-Humphrey, Vieaux-Wagner, Vidovic-Redgate, Tennant-Jacobson, etc.
IMHO. And yes, I am tweaking you a little. Don't forget to have fun.