Oddly enough my last video I posted for my channel (Coin Stories) was about being able move past the past. Most everyone in the crypto space has had that thought at least once that they may have sold too early or too late.
I really hope you are correct about a year of altcoin accumulation. The tricky part of that will be picking the coins that will be around the following year.
I think trading exact top and bottom is near impossible. And depending on your trading goal, profits levels and trading strategies are different for each person.
I think its better to focus on keep making winning trades instead of profit levels but it's just my opinion.