There is no doubt that Bull-Runs are emotional rollercoasters. From euphoria to panic in a few days, we are all prone to those feelings. The only antidote is knowing what your emotional spectrum will look like in advance. Also, you need to remain rational at all times despite the dopamine, adrenaline or cortisol spikes.

This is going to be a straight to the point Journal, explaining the different emotions you will all be going through. When you anticipate them, you can plan out your actions.
The ultimate goal of being in a bull-run is "exiting with as much profit as possible". The only way one can do that is by knowing thyself.

Take a look at yourself from the outside in.
The NUMBER 1 Rule: Expect things to NOT go as planned - Stay Agile
Let me give you an example:
A few weeks ago, as Bitcoin relentless ripping higher through $42,000 we shared that we were beginning to DCA out of BTC for 14 days because the euphoria was getting too hot in the market. Our expectation was a continued run to $50,000-$60,000 (irrational exuberance) before a dump back down. What happened instead?
A few days after we begun DCAing out, Bitcoin topped and dropped to $30,000. That move invalidated our "irrational exuberance" theory. What did we do? We bought back the BTC we sold at a cheaper price and now have more BTC.
Why did we buy back? Because the dump simply reset the euphoric sentiment and people were once again no longer trusting that Bitcoin can actually keep going up. Doubt was there again, which is exactly what is needed for longevity of a run.
We adapted, we flowed with the market.
"Do you want to make money or do you want to be right?" The correct answer is: I WANT TO MAKE MONEY, always.
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Here is exactly what happens in someone's mind who says they want to buy the dip:
X is down a lot today, I want to buy it but what if it keeps going down? What if I put in $1,000 and they become $600 tomorrow? What if instead of buying 1,000 units I get to buy 1,200 units?
They then proceed to procrastinate on taking action. If X is fundamentally good and begins going higher they think:
Yesterday $1,000 got me 1,000 units, today they buy me 800 units only, yesterday I could have more. I'll wait, as soon as it goes back down I'll definitely buy.
It then keeps ripping, until one day the person FOMOs.
The bad result is obvious, but what is the underlying reason for this bad result? Expecting to buy the absolute bottom.
More often than not, YOU WILL NOT CATCH THE BOTTOM. You do not need to catch the bottom to make money and that is the beauty of it.
Now for the other side of the story: Selling at a profit
Here are there are two potential scenarios:
The market keeps dipping and they sell for $250,000.
The end result is obvious here as well, the underlying reason behind that result is: Expecting to sell the absolute top.
Dollar-Cost Averaging is not done over years, you can DCA into a position over 2-4 weeks by buying a little bit everyday to get the average price. Just like you can sell a little bit everyday to DCA out where you believe a top is beginning to form.
As we write this, ETH/BTC is challenging a resistance it has not seen in three years and ETH is trading at $1,350. Having bought ETH at $100, $320 and $500 we are euphoric. But we know what the market is in now, a bull-run which means we definitely will not be caught selling early. The odds of this being the ultimate top are very very thin. We remain patient throughout it and wait. We've been relentlessly working for years, we certainly won't cut our rewards short.
When we were buying dips: $100, $320 and $500 in the case of ETH, it certainly didn't feel good. You feel uncertainty, the "what ifs" play out in your mind. We personally countered it with "What if ETH is trading at 4 figures in a few months?" (we're already there lol). In those times, most people were screaming bear market, we cut the noise out and just focused on our thoughts and analysis. Rationality wins.