now Bitcoin price has increased 17.5% in the last 7 days and now the price is $27,750.69, then BTC Domination is 70.9% with Market Cap amount $727,677,130,354, but Ethereum price is currently $644.61 and is down 1.44% from the last 7 days, so I bought Ethereum with all my money (money that I use specifically for investment), because I believe Ethereum price will soon increase very high (bull run) following Bitcoin price movement and of course I will get a very big profit from investing in Ethereum (my target for Ethereum price is $1100-$1400), because I believe if Bitcoin dominance decreases, then it will make the price of altcoin increases (including the price of Ethereum).
In my opinion you did nothing wrong I vouched for ETH back when it was $11 for 1 ETH , back then I didn't had much to invest so I kept in BTC to grow then when BTC hit 15 grands I pulled and invested in ETH at low value of $80 .
ETH is a good crypto with market cap value of 82 billion next to only BTC, but you shouldn't have invested all , with BTC still going in upward trajectory with proper monitoring you could have made some more profit from BTC.