It would need a proper capitulate bottom and long accumulation for one of those imho.
A year ago, I was saying the same thing. "We need another capitulation and long term accumulation bottom just like 2015." I don't think that's actually true anymore. We were just conditioned by the 2014-2015 bear market to expect that.
But...bbut...you already had a
proper capitulation. It was that massive dump that started on 11-11-18. When the smoke cleared the float price went from ~$6500 down to $3200. Price cut in half, guys.

Well that covers the capitulation part, sure.
Also, trading volatility cratered and stayed dead for 3 straight months.
Compared to 9 months ranging at the bottom in 2015. That's the "long term accumulation" part. A lot of experienced traders (including me) were blindsided by the speed of the recovery in Q1 last year. Look at this shit:
As for what's "causing" this? I would say it's little more than seller exhaustion and relief rallying. Supply has really dried up since the December crash. If we break the February highs and head to $5K-$6K, I would still just call it a short squeeze before we bleed back down to the $3Ks again. This is how long term accumulation ranges usually work. That's where I think we are, rather than the true beginning of a bull market.
Or this thread from mikeywith. When the market cut through $6K like butter, we had to change our tunes. I took that experience as a hard lesson about recency bias.
A year later,
sgbett still hasn't changed his tune.