There is already a very big tax break for entrepreneurs: QSBS. You have to stick it out for 5 years (the rollover provisions are not well aligned with SAFEs),

There is already a very big tax break for entrepreneurs: QSBS. You have to stick it out for 5 years (the rollover provisions are not well aligned with SAFEs), but all your capital gains are tax free up to $10m. Reforming the rollover provisions or making it not a hard cut off would certainly be helpful though.