BULL'S GROUP - always putting money into the market and does not take out often, more like long term investor.
BEAR'S GROUP - always taking money out of the market often, more like only interested in making money in a short while, i mean short term investors.
In fact, how can you make profit and withdraw without first inputting something. We're all in the bull group by inputting or investing our money or other resources into projects or coins and later withdrawing to make profit when we see deem fit. The fact is, some investors are short term ones whereas others are long term. Others are also swift with their withdrawals and never hesitate to withdraw.