But you CAN lose all of your life savings if you left the bitcoins in MtGOX, invested in Neo & Bee, or any of the other zillion bitcoin scams. (The first time I heard of bitcoin was when Rick Falkvinge tweeted that he was investing all his savings in bitcoin. Guess where he left them. Fortunately for him he managed to get part of them out in time.)
You can also invest your 50'000$ of savings plus 50'000$ borrowed from relatives, friends and banks. (You can bet that many people did that. If the salesman says that for sure BTC will be worth 1'000'000$ in a few years...)
Personally I think it is a good thing that a government does that to a certain extent, if it would not we would all be at the mercy of the gods (1%'ers).