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Diversifying a portfolio into markets such as precious metals, real estate, ETFs (Haejin has good recommendations for that as well) and Peer-to-Peer lending (Prosper.com or Lendingclub.com) helps to make healthy and inevitable market dips less nerve-wracking. When one industry is falling another can be rising unlike a portfolio that only holds cryptocurrency.

You are totally right. Not long ago I've started getting into ETFS and got my broker account verified.