Behavior of past companies is the reason for concern.

Example:

• 1st Production Run: A company gets a big business loan - R&D a prodct, Deliver a 1st run product that everyone is excited about. The company then depletes business operating funds after the 1st production run.
• 2nd Production Run: Company displays some fancy CAD designs for the 2nd generation product. Require everyone deposit money upfront. People drop boat loads of cash for hundreds or thousands of units. Company fails or disappears and never delivers the products

I'm not saying that's what is happening here but this type of business model/operation has been seen multiple times and many people have lost out significantly.

I'm ok with putting money down if I can see a physically working product in video and someone has one in their hands to review. This tells me they have enough capital to actually produce the product with the money I deposit on it.

if all they can produce is CAD images of a product it's cause for concern when the company operates in a country where you have no control if they just walk away with your money.

So for me, unless I can pay with a credit card which gives me some security of ZERO fraud liability on my part, I'll likely pass as well on a pre-order until I see units actually being produced.

Some people have money to buy into high risk endeavors, I'm not one of them.