The current situation of alts is weak and volume also down accumulate our suggested coins in dip i will suggest you today 4-5 dip entries. Buy partially that coins to get lower average entry. 
A good suggestions and that is also go down to buying as lowest price as possible. I think most of the altcoins that do very well in 2017 are now undervalued now and it will not be bad if you can invest in them now. In some months to come some of them are really going to recover and by then, you will be able to sell them at profits.