Prices for alts may be good in 2020 because alts go after Bitcoin and Bitcoin will have a halving this year, which should raise the price of Bitcoin and the price of many alts.
agree with you, when halving coming its mean that cryptocurrency season started which all altcoins and bitcoin increase high price... although a lot of people said that halving does not impact with bitcoin price but i am believe halving will impact in bitcoin and altcoins price, i hope halving will help altcoin price and bring new hope after a lot of dissapponted in 2019