So, you wanna know what is really happening? the US government are taxing those who are in possesion of bitcoins and they are being obliged to file before the first week of June. Now, here is the deal: if they appear to have no bitcoins by June, they would only be taxed for what they have earned prior. But if they have bitcoins, there will be a different computation for their taxes... that definitely caused a mass selling. Now do the math.
This is nonsense. First, the tax deadline was April 15th and obligations would have been over before June. Second, that's not how the tax obligations work. You can't sell your Bitcoins by a specific date to avoid paying taxes on them. Third, if this was true, you would expect that the bear market would have ended by the start of June, but it hasn't. We've had a couple spikes here and there in a long and sustained downward trend. The spikes have been short lived and soon revert to the downward trend Bitcoin has been experiencing since the all time high in December. Your theory does not explain what has happened or is still happening.