The person buying the secret will pay less than the long term profit as a fee for them giving you the money upfront now.
But if you have rights to resell the secret multiple times you will earn money far quicker, perhaps more than the secret’s long term value.
This is why Wall Street is able to hire talented young traders, some of whom will develop profitable systems. Over time, some of them are able to amass enough savings and the track record necessary to get investors. But at t=0, somebody has to pay the rent.
So, "big bets", especially wig margin, require small movements (or small bets with big movements). And getting in debt is never a good idea, because a tweet by Jerom, Kristine, Vladimir, Xi, Putin, Macron, can send you packing and with an extra $200k debt at 20% interest rate, from which th average person will never recover.