The last time BTC went up 10x was from the March 2020 lows to the beginning of this year. It took about 9 months, but the March 2020 lows were only that low due to a crash that caused the price to decline (and quickly mostly recover) by around 50-60% in a matter of days. If you remove that few-day window when BTC was trading in the $3k range, it took almost two years for bitcoin to trade below $6k (may 2019) until it hit $60k (March 2021).

I don't think bitcoin has gone down 90% from any peak in the last 5 years, but it has gone down by a lot. As mentioned, it went down from just under $9k to the mid $3k range in March 2020. It went down ~45% from May to June of this year. It went down around 55% from December '18 to February '19 (it bottomed out in December '18 being down ~85% from the previous peak).

If you lower the threshold to going up 5x, bitcoin last did that from September '20 to February of this year (5 months). It previously went up 5x from August '17 to December '17 (5 months).

There have obviously been plenty of 2x increases, and 50% drops over the past 5 years. In general, I think a lot of the drops tend to be swift, although often it will take some time for the bottom to be reached. On the other hand, at the end of week 1 of a massive uptick in price, we have generally not yet seen the local high.

When this thread was opened, BTC was trading in the ~$31k range. I don't think it would have been crazy to say the price would go up 5x from the date the thread opened to when the contest ends.

The contest is far from over. There are things happening in financial markets right now that make me believe that we will see a lot of volatility in the coming weeks. I would not be surprised to see bitcoin go up 2-3x from local lows, nor would I be surprised to see a massive drop in the price. The question remains however where the local low is going to be located.