Hello!
Over the past days BTC has fallen quite a bit, also ETH. Any clue why? Seems to be opportunity to buy more.
Yes it is always wise decision to buy every alts that are in red during bloodbath, if you have bought at the time of your post than you are already in profit.
But this is not that cent percent assured of getting a profit. The reason is that with bitcoin we can trust and buy even when its in bloodbath, but we cannot predict the alts in a similar manner because there are Alta that has gone down continuous and has never retained value. Here too you need to be lucky to get good profit.