There is no point to explain to him anything, bitcoin price will not go back to 400 dollars, but even if it does it will bounce back and if he leave now he will miss all that for sure. That can't happen, but this guy made us think what if something like that happen and to create some theories.
Price fluctuate all the time, last drop is caused by the sell of in Asia, market lost almost 100 billion dollars in seven days, some alts dropped even more then bitcoin.
Who could imagine Silver price will fall to $9/ounce and gold to $900/ounce. I see DOW Jones at 7000
It is fact that bitcoin price is as volatile but as much that to go down to $400 in the future. We are looking upwards in the price in the future and you are talking about the crash in the price. You are leaving bitcoin for next five years, it means that you have no patience and you cannot wait for good times. If you want to buy bitcoin go ahead and buy some to earn money in the future.