Agribusiness is a lucrative sector. But don't be deceived that it's all a bed of roses. Besides acquiring the necessary skills to start and run a farm it has some high level risks. An outbreak of disease can make an agribusiness go bankrupt.  Some small scale farmers might not be able to afford insurance policy which will make them lose all in case of emergencies.

Agriculture business can also face setbacks if the government fails to make policies that will protect it from foreign competitors. When the price of imported agricultural products is cheaper than local producers, they will end up making great losses.

The example that you gave that cocoa has made more profit than Bitcoin is valid. But have you considered how long cocoa farmers have suffered from the drastic price drop? Many cocoa farms in my country were abandoned because cocoa farming became unprofitable. Only the patient cocoa farmers are benefiting from this price increase.