$10 for every possible coin that has potential in bull run? Sound not right since the amount, $10 is very little to give back a good profit, even with 200% bull run. If you are spreading too thin then no matter how much potential a coin is, won't have a good result. Remember, you need a lot of time to check and update those coins as well so one missed chance or wrong timing would ruin your plan.
You're assuming hundreds will moon in the bull run, and he's assuming you pick like 10-20 most promising projects. Of course, the list will vary from person to person, but if you dig around a little, you'll see what many people are gravitating towards. Even some youtube guys have their favorites and speak about them openly