For me the safest strategy is to use btc like real money. The main idea here is not to be instrument for investment but world wide spread currency. There is no difference between black/red on roulette and ETFs... Of course you can do it with free money.

Good strategy is to create conservative business and to provide payments with bitcoins and regular money. Try to safe your profit in crypto and in a few years you will be very happy

4 @ 10 mBTC

4 @ 6 mBTC - PM from 31/03