Chart comparing BTC with ETH and LTC

Since I'm working on a tutorial to share with friends, acquaintances and associates suddenly interested in buying Bitcoin , I thought I 'd make a comparison chart of BTC , ETH and LTC. This chart shows ETH up abut 295%, BTC up about 277% and LTC up about 206%. Back in 2017 I had put a sell order in ETH and LTC and the bottom fell out. Out of the three cryptocurrencies I have also believed that BTC was the most valuable and that the other two were way below and behind. This comparison chart seems to indicate otherwise. What am I missing?
Chart PatternsTrend Analysis

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