Selling your assets to buy Bitcoin is not advisable except they are liability that are in form of assets and they are not productive or bringing any returns or proceeds for you at the end of the day but if they are business assets like lease office equipments such as heavy duties, caterpillars, construction equipments and lifting equipments these are very good assets because they give you good proceeds so you can't sell such assets to buy Bitcoin but you can use the proceeds to invest in bitcoin, the only time you can consider selling such assets to buy Bitcoin is in a case where they start malfunctioning or getting old such that the cost of maintenance may be higher than the income they generate for you.
I think before anyone consider selling their assets to buy Bitcoin or invest in bitcoin, it's because the assets is not productive, the assets is no longer serving its purpose or becoming a liability. Weighing this factors investors can decide to sell such assets and acquire bitcoin, because there is value of holding bitcoin. But it not a good investment decision or advisable for an investor to sell an assets that is productive or income generating assets to buy Bitcoin rather you can invest in valuable assets like Bitcoin by using the proceeds from productive assets to buy Bitcoin it's more sensible approach. This way you can diversify into Bitcoin investment while still maintaining your income generating assets