I wonder why? I would hope nobody would invest more than they can afford to lose with GRBG. Beginning to sound like another big pump so somebody can unload their shares. If you notice on the charts that each time this stock got pumped it's highs were much lower than the previous pump, so be very very careful here!
It could very well be that some got burned on the past pump and want to push this higher so they can unload and run away. JMHO