Once you sell, then you are out and if BTC goes from $3k to $10k, then good luck finding a time to get back in the market. I won't sell unless I am in desperate need for fiat currency.
Not necessarily. That only goes up for people that are selling everything at once. Main point of importance is that in case people are looking to secure profits, they have to stick to selling MAX 20% of their coins (I personally mostly stick to 10%). If the price after that is going up as per your example, people will have enough coins aside to benefit from that increase. If the price happens to go down, you'll benefit as well, but in the way that you buy back at lower levels.
