Exchange shops are usually cheaper if you choose the right ones, superrich or Vasu of in Bangkok. Though they are quite picky with notes. Slightest damage gets rejected.
But many exchange shops have horrid rates as well, so do your research based on your location. And avoid exchange more than absolutely necessary at airports.
nope lol. Will obviously grow slower, all markets do they go bigger. Where just in the early says of this BTC cycle, this is my 3rd cycle. Expect somewhere between 250-300 before next bear cycle