A good way to minimize the risks is not invest real money (or invest a little amount).
With some efforts you can earn bitcoin from faucets, forum signature campaigns, glambling (not recomended), trades, etc...
After achieve a good bitcoins amount you could invest It. If you lose all, you don't lose your money.
I agree with you, your way of thinking is very good not to take risks, if you want safe it is advisable to follow various signatures. This is a good way of thinking. Of course you are a very smart person in taking keputsan, this is a good way if you do not want to lose real money. In the sign. Hands get bitcoin very easily just do something to do without draining the slightest. I hope this helps.