The whole essence of bull run is centred on the Bitcoin, because the main name of the bull run is Bitcoin halving, btc is currently at $70k and eth is @ $3600, there might be fluctuation in the price of this coins but immediately after the Bitcoin halving or even before the halving Bitcoin will rise to as high as $130k dollars and Ethereum will get to $15k dollars reason been, Bitcoin will become relatively scarce because of the effect of the halving the number of coins miners can mine from one Blockchain will reduce and that will skyrocket the price of Bitcoin and Ethereum. Please when the price of Bitcoin rise to $130k sell your Bitcoin immediately the same thing is applicable to Ethereum because history from previous bullrun shows that a month after bull run there is always a huge price drop in Bitcoin prices, Invest in Bitcoin and Ethereum and when you make profit sell your coins.