Top losers are DBG (-98%), Ripple (-33%), and Tron (-27.5%).
It's DGB. These coins actually didn't have a good move for this year so it's obvious why they are in that position of decreasing active daily addresses. XRP didn't really have a movement for this year.
Tezos is amazing and it's because of the staking that was opened by Coinbase and Binance. No matter how bad the year for these altcoins still there will be altcoins that will show an amazing performance. We may see changes by 2020 and it's hard to say that these bad performers can even recover although I'm not really counting on them and not an investor of those.