Cryptos have been counting the ups and downs in a balanced way lately. A coin that increased by 15% today, 2 days later we see that it has decreased by 25%. To what do you attribute this fluctuation?
When will cryptos enter Taurus month? Does anyone have any enlightening information on this subject?
When can ETH catch up with BTC?
My answer for now, ETH will not be able to catch up with BTC.

When you see how the difference between Bitcoin's market cap and Ethereum's market cap is, then I can make sure you can answer the question yourself when ETH can catch up with BTC.
As of now, we can clearly see that bitcoin has dominated the market, so no altcoin could surpass the marketcap of bitcoin.
To see the bigger picture, the current dominance rate of bitcoin is 41.6%, the rest belong to the altcoins, both real and shitty projects.
https://coinmarketcap.com/charts/#dominance-percentageHowever, there's no assurance that bitcoin will always be the number 1, but like most people said, they don't believe bitcoin will be replaced in the top spot, so the chance bitcoin getting replace is very slim or close to impossible.