People buy ethereum with bitcoins, ethereum is in a parabollic movement for sure a bubble. Ethereum will grow until bitcoin cannot go lower. This pink line is the historical floor for bitcoin, so probably that's the limit. Then Ethereum sellers won't find buyers, so the bubble will bust.
I'm posting also the ETH bubble as i think it will be drawn.
SELL -> LIMIT PRICE 389.45 STOP PRICE <= 389.55 (Order will be triggered at this price or below)
BUY -> LIMIT PRICE AT 250.16
BUY -> LIMIT PRICE 0.03145 STOP PRICE >= 0.03138 (Order will be triggered at this price or above)
SELL -> LIMIT PRICE 0.04752
Of course, it is you responsability to follow (or not) what I do, but i have set up everything like that so in case BTC breaks down and ETH up, i start winning. xD
I could have done ALSO the opposite but I am just lazy and all in in this idea :)