We have access to all the statistic data, we have most genius analytics, we have AI, but that does not help to create everyone rich after using ultimate buyers guy. That is why I see only two options, either there is no guide or "yesterday".
If you mean by yesterday is when the time BTC was still a cent, there is still no way for the people to buy it because there is no such thing as time machine. Only those people who join BTC that time are lucky or knowledgeable but holding their coin for a long time is going to be a tough battle. I think only a few have been successful to hold up to this point. It will be better if we won't regret with our actions. We must only think that everything happens for a reason.