Never a nice piece of news whenever we hear someone decides to end his/her life. Investing in bitcoin are no difference in investing in stock market or commodities dso the element of risk will always be there. Similar to many posting here, its not advisable to invest everything you had in one item cos it could break you.
There is so much can be done by this person (if he's still alive) i.e. helping those in need be it a monetary or charitable cause. But what is going thru his mind, I have no freaking idea. However, suicide due to failed investment doesn't only happen in bitcoin, it has always been happening in other investment too.