This looks more like they're using Bitcoin as PR than anything else. First, they sell 21 Lalibela tulip bulps for €41. I checked another website, and for the same price I can buy 6 times more bulbs (including shipping). So that's a massive profit margin.
Allow me to share some history: Dutch greenhouses are quite famous, also international, and most of them are concentrated in Westland. The reason they grow fruit, vegetables and flowers in greenhouses is of course because it's very profitable. It's a massive industry, and they got quite wealthy out of it. The main reason: very cheap natural gas! They used to burn the gas just for CO2 and heat, while getting electricity for grow lights from the grid.
Later, more and more of them switched to Combined Heat and Power (CHP), producing their own electricity: they burn the gas in gas turbines that power generators, create electricity, sell part of it back to the grid, and still get the same amount of CO2 (and a slightly lower amount of heat). Apart from being less polluting, the main reason was of course increased profitability. They basically became power companies.
Nowadays, there's a CO2 pipeline from the Botlek industrial area, "feeding" plants in Westland greenhouses. They turn waste CO2 into food, which is a further efficiency improvement.
Now back to BitcoinBloem:
I guess that instead of flowers they could also grow food like fruits and vegetables, and this could be done in especially in cold regions.