Liquid Alternatives
  
See: Liquidity. See: Liquid Market.
A liquid alternative is a version of something that you previously couldn't sell. But now you...can.
Like...you used to have virtually un-sellable shares in a pre-IPO company, but you swap whatever their value is for liquid shares in AMZN, who was an investor along with you. Now your illiquid private company shares are...liquid. Magic.