The Bitcoin price surge of April 2, 2019

Here you'll read an interesting analysis of the BTC price surge in early April:
https://tradeblock.com/blog/analyzing-the-bitcoin-price-surge-in-april

"Initial media reports offered varying explanations for the sudden surge in activity, suggesting the price rise was caused by April Fool’s hoaxes or short squeezes. Perhaps the most cited explanation were reports indicating that a $100 million buy order spread across certain exchanges, including Bitstamp, caused the price rise. We have found, however, that this suggestion lacks plausibility. In this report we analyze exchange data from various platforms to understand trading activity on that day."

What do you think?
Was the price surge ...
a) caused by April Fool's hoaxes
b) the result of short squeezes
c) a manipulation by a big trader (institution)
d) coincidence

If it was caused by a manipulation of a big trader, would it be more likely that the BTC/crypto downtrend has not been broken and we will experience a new bottom?