I do not think bitcoin will fall back to $ 6000, is it time for bitcoin to rest? and replaced by ETH or Ripple?
I want your answer based by the reasons.
Ripple is a pump and dump coin whose major supply is held by a single company, and hence, it CANNOT replace Bitcoin ever!
As of today, there is not any coin which can replace Bitcoin. Probably in the next few years we might see a coin climbing up the chart but to dethrone bitcoin from the top would take a herculean effort. In most countries, people still think BTC and Cryptos are synonymous and still cant differentiate between the both. So, expecting bitcoin to be replaced by some other ALT would not happen.
Also, price can never be stable. It will always be volatile. 6000$ is a support price for BTC and we can expect it to rise again soon.