That is not the first rule whatsoever, and nobody but the ill-informed would agree with your statement.

Yes he needs to be careful with security, and yes the price is volatile, but no more than a large percentage of stocks.

As long as he has capital to invest, then I say load your boat with as much as you can afford without compromising your day to day needs. Be prepared to wait because this could take longer than anybody can predict, and be prepared for gut wrenching ups and downs.

As long as he has a job, or some sort of income for living on, then he should sink every last penny he can into it.

With every Central Banker from every developed nation printing money off at a pace never seen before in history, people should be buying as much of this undervalued asset as humanly possible.

These are the days that people will look back on and wish that they had sunk everything into assets like bitcoin, gold, silver, platinum and anything else which is true money.

It is time to abandon worthless paper with pictures of dead Presidents, Dictators, Kings and Queens.

Ask yourself this simple question:

Do you really think printing ink onto paper is money?

Of course not, that is currency...not money, and if you don't know the difference between what money is, and what currency is, you will when the bond market, the stock market and every other insanely overvalued market implodes and people flee into true money.

True money is your time and your effort. The only reason money has value is because it is scarce.....not some worthless piece of paper with pictures and numbers.

Your time, and your effort, these are the things of value. This is true money, and the closest things that follow after that are things that take your time and effort to produce; be it gold and other precious metals due to immense capital to extract from the Earth, or bitcoin which takes your time and capital to extract from that finite supply of 21 million.