I suggest altcoin suitable for trading is,
1. doge
2. dgb
3. ltc
4. eth
5. dash
3 top of that I would suggest is altcoin very nice, because it has little value and own advantage, while eth and dash for the moment have a good time to sell.
i hold dgb too long and i stuck, so i suggest dont invest on it..
hodl dgb. big things coming after 9 june.