I had a recent talk with this American speaker about tax liens investment My questions are would it be alright if I would just stick to stocks and municipal bonds instead? Would tax lien certificate be a good return? Pro's and Cons? I'm asking this in relation to a real estate software and Bond that I'm trying to crowd fund(well perhaps in the near future) when Im done coding

More important which venture would yield high returns ? Tax Lines or Bonds or Forex?