I put together a list of the percentage gain you will have if the different top 20 (by MC) coins goes back to its ATH.

Most of these reached their ATH in the last few months. The exceptions has their ATH date in parenthesis, since a 3 year old ATH is significant in terms of whether its a must buy, or a dying coin, but thats up to your DD to figure out.

I did this to find some buy opportunities myself, but hope others can benefit as well.

1 Bitcoin BTC 90%

2 Ethereum ETH 87%

3 Binance Coin BNB 114%

4 Cardano ADA 74%

5 XRP XRP 411% (Jan 07, 2018)

6 Dogecoin DOGE 215%

7 Polkadot DOT 208%

8 Uniswap UNI 95%

9 Bitcoin Cash BCH 644% (Dec 20, 2017)

10 Litecoin LTC 197%

11 Solana SOL 72%

12 Chainlink LINK 161%

13 Polygon MATIC 134%

14 Ethereum Classic ETC 207%

15 Internet Computer ICP 1416% (holy shit, had to double check this one)

16 Theta Network THETA 154%

17 Stellar XLM 237% (Jan 03, 2018)

18 VeChain VET 232%

19 Filecoin FIL 319%

20 Tron TRX 258% (Jan 05, 2018)