Thoughts of 21 years old boy about BTC/ETH & USD/EUR

This morning today and every morning when I wake up the first thing I check out is eth cryptocoin and bitcoin«their rise to heaven»».I'm getting in stochastic moments and I ask myself why bitcoin and eth are the first cryptocurrency coins and not other one in the crypto markets.During at work I think that I understand that question.So if we look back to world history will see that dollar made its appearance many many years before Euro.So when dollar come out to market year by year it was getting stronger by making a lot of transactions but something was missing.And what was that? COMPETION.Somebody will ask why USD needs competitor when it gots the monopoly of the market?For one reason.For Money flowing.People always want to invest their money without accepting that they'll lose their money and they invest their money to the top player USD for,you know,just to play it safe like BTC,BUT,in the other side there are some other categorie of people who sees in EUR some competitive potentials to invenst like ETH(i think that this people are bad asses in a good way).Where is my point?If you remember by history when the crises broke out in Usa the first time, it draged down with it all the other coins as the second time.That what I have noticed is that when btc getting up so the etherium too,when it falls down eth too.I think that these two have been created to be together.They just influence each other 😁.
These are early morning thoughts of a 21 years old man or teenager :) .
I would like to know your opinion about these subject and what you believe about it.