In april / may i bought several alt coins and virtually "closed" my portfolio, as i had small positions in sectors i believe
6 months later, this strategy has proved to be a total fail, value in USD has increased but value in BTC has dramatically decreased and i could have earned so much more by just investing in BTC
Any of you guys in the same situation? advices? what's your strategy?
It is depending on in which coins you believe.
Personally, i did almost the same (but kept about 15% in BTC). My gains were about the same like BTC (most gains came from VTC and Zcoin).
Since i believe that BTC will fail in the Long-term, i will stay with my altcoin Portfolio. As an adive i recommend to hold at least 10% of your Investment in BTC, just to be sure.