Be realistic? Your $100K estimation isn't realistic. We surely won't have another 10x in a year. CME and Nasdaq will start trading Bitcoin futures by 2018. Fresh, huge sums of money are coming in. As more money got invested in Bitcoin, the volatility will lessen. In 2018, the market will decide if Bitcoin is really worth $10K+ or not. There is a rumour that the current price is inflated because Bitfinex and Tether print tethers that is not backed by real USD, thus using those tethers to pump the price. We'll see.

By the way, if BTC goes tp $100,000 I surely won't hold fiat anymore. There must be some problem with the current economic system that made Bitcoin rise to $100K if that will ever happen. Fiat will probably become worthless, why would you sell your precious BTC to worthless fiat by then? My advice would be not selling Bitcoin at all, especially if it goes higher than current ATH. Instead, spare some money to buy more Bitcoin. I personally believe that Bitcoin is the future. I'm currently selling them for two reasons: to get more Bitcoin while the price corrects and occasionally take my profits to make a living.

If you need Bitcoin for any important purpose in life, then without any second thought just sell it. Bitcoin is pure money in the form of virtual currency, no doubt Bitcoin posses bright future in the coming days as it values will skyrocket beyond our imaginations but on the closure this money is raised for ones own needs and particular purposes and if you reach such point then simply sell it.
Bitcoin will continue to rise in the coming ears but if you will wait for the highest value then you might need to wait for a very long period.

What's more than that required. When the price reaches the quoted price surely I'll sell what I've in my wallet. This will let me make my life in a better way as well enjoy what I have made after long years. Hope such a growth will happen to fulfill my desire.

I dont think that Bitcoin can rise to $100000. Therefore, I will sell when it reach $50,000

Bitcoin price has a trend of a factor of 10 every two years. In 2015/2016, price was $1000. In 2017, $10,000. So this is two years if you will count from 2015. Two years from now, probably $100,000. Another two years, $1,000,000. This would be year 2021 when that happens. Question is,  are you patient enough to wait that long? And are you willing to take the risk of holding to reach that point? It's all up to you...

I do not think you have the luxury to think about those prices yet, we just surpassed 10k and you want to sell at 200k? Obviously if we reached those prices I will sell my bitcoin and enjoy the rest of my life but there is a lot of road ahead of us before that day comes.

I only have a couple of dollars in my bitcoin wallet but if the price of bitcoin vs dollar is 100,000 i think that is good selling price you can buy many things if that happens.

I would love to sell it at 100k but i do not think that someone will be able to buy it because 100k is a very big price and i do not think that a normal person with a normal salary would be able to buy such a expensive coin.

The decision that you make to sell bitcoin is not easy at all. You sit while having dozens of thoughts whether to sell bitcoin at that price or hold it off until the price goes up. Since the rise and fall of the bitcoin is not predictable, you will be in a bad spot trying to come up with a wise decision.

In my humble opinion, I would not hesitate to sell it at 100k$ since it is so high. I learned to live my life without regrets. So either I make the right decision or not. Regret would cost you falling into depression.

In my opinion no one should sell all their coins ever. But I understand that some people just can't hold all BTC they have forever because I am one of those people. We need some cash for our daily needs and that's why we sell some BTC.

Even if Bitcoin hits $100,000 don't dump everything. Sell the amount equivalent to your needs for the next couple of weeks, a month max, and hold the rest. Who knows, maybe it will be $200,000 a month later.