Some ideas:

Bitcoin collectibles Physical coins (like Casascius), bitcoin art, things like framed 2009 The Times article, t-shirts and other stuff related to bitcoin.
Maybe a business where you print and engrave stuff, including bitcoin logos, people's addresses so that they're visible on people's personal items.

I don't know what your background is. For instance if you're in car detailing, you could make wraps with bitcoin related stuff and place them on people's cars if they want to drive with their wallet QR code on a bumper and such.

I've heard that reselling and refurbishing used mining equipment can pay well, but you have to know how to do it.

If the OP cannot utilise buying/selling via a website your suggestion of collectibles might be a good first step especially for any items that date back to 2009/2010 as they would have a lot of value.

Without knowing the background skills the OP possesses it will be difficult to understand what ideas he might be open to but would he really want to rely on other people to create and maintain his websites and have to pay them for their services? Maybe he will feel far more comfortable doing something else on the lines of what what was suggested by coolcoinz because it removes intermediaries but that is for the OP to expand on.

If your idea is a small store/shop as you wrote in the OP:

I don't know where you're located, but many people do not have access to a store selling goods covering basic needs (clothing, grocery articles) with Bitcoin and for a competitive price. Most stores in my country which accept Bitcoin either only offer a limited range of mainly high-priced and imported goods (for example phones), hospitality (hotels/apartments for tourists), or they are demanding a large premium (think of the Amazon resellers).

Entering this niche can be a business idea, but of course you have to research if the market with the goods you're wanting to sell is already saturated. Also research which gift cards are sold in your country via Bitrefill, because gift cards of course compete with physical goods.

Alternatively you could provide gift cards yourself cooperating with businesses which are still not accessible on sites like Bitrefill and could have demand from Bitcoiners.

If the goods you're selling are low-cost, I would also suggest to accept other cryptocurrencies like LTC or XMR, because they are more convenient due to their lower transaction fees.

Hmmm yes bitcoin ATM maybe a good thing or business but not in all area or country, I mean we know that bitcoin is still not being used world wide and only a few population actually use bitcoin or crypto currency, yes maybe many people now knkws about bitcoin but again there are only a few that actually use it, so if you will to be build an bitcoin ATM I think you should know first if it will be useful for many people or if there will be actually using it, I'd say this might be a good suggestion but I think its still too risky and I think its still far to consider this kind of business, but I do think this concept will be a good business but I think not for now, not in this timing, maybe in some future or little more time until bitcoin will be known and used world wide.

Any business can be related to bitcoin nowadays, just put it somewhere in your business that you accept bitcoin as a payment and you'd be set for life. Also, it's nice that you're asking for ideas of business that you can start with the help of bitcoin or that's something bitcoin related but you have to remember that what works the best for you might be the thing that you need to work out on because you might think that the idea right now that's recommended to you is good business that you can do but then when you're doing it, you suddenly realize that this isn't it.

You have to consider many things from both sides for a business operator, entrepreneur and customers.

Accepting Bitcoin will bring advantage and disadvantage. As a business operator, you must consider some things like.
How the customer payments in bitcoin, to your business wallet, will be stored. It relates to security of your business fund, treasury that must be secured and safe.
What will you do with customer payments? Do you store it as your business investment in Bitcoin or will you have to sell it to get money for your business operation?
It decides your plan to hold your bitcoin from customer payments or sell it immediately after receiving.
Marketing, how do you attract customers to your business and convince them to use bitcoin as payment method?
If you have to do discount for them, it can affect your business budget, net ROI.

As customers, they have to think of extra on chain transaction fee if they use Bitcoin blockchain as payment method. They will have to ask whether your business take care of their on chain transaction fee.
Customers will not be ready to pay extra fee.

Lightning Network can be a good choice for business with not big transactions from customers.

I don't think there's other promising business idea except selling merchandises about Bitcoin especially you lack of capital.

If you offer something not related to Bitcoin, the buyers don't care with Bitcoin and they most likely will pay with other payment method.

But, if you sell things about Bitcoin, the buyers most likely Bitcoin enthusiast or interested with Bitcoin, they may likely pay with Bitcoin even though it would cost them more.

Banks in my country a restricted from making some amount of payments to customers. Businesses and individuals have a limit they can withdraw or transfer. This limitation is affecting businesses that need to make payments both locally and internationally. I know some importers who are having problems with their international partners because of this problem. Convincing them to accept Bitcoin and providing such services can be profitable.  Having a payment service where the firm can help individuals and businesses make payments using Bitcoin will be a good one. This service can help businesses invade this restriction affecting them negatively.

Bitcoin is known as cryptocurrency so it is obvious that to best utilize Bitcoin in a business related activity, one must integrate Bitcoin as payment method.  I bet @OP had already know about this.  If you are thinking about which business can maximize Bitcoin's potential then I think an online store or online platform is the best option since Bitcoin is best for online transactions.

Bitcoin collectibles are also a good option but I think there are lots of option that is much better than that in terms of profit.  You can also create a freelancing platform that can mediate job orders and freelancers and offer them Bitcoin as a mode of payment.


Either way, no matter what kind of business @OP is good with it is given that the best to utilize Bitcoin in terms of business establishment is to use it as currency, then it is up to @OP whether he will convert it as the transaction goes or hold it for future profit.

When you are considering to add Bitcoin to your business for business treasury and for business payment method list with different options for customers, you have many things to deeply analyze for cost and benefit.

As a business, what will you, as an operator of it, do with bitcoins received from your customers?
Cash it out instantly after receiving.
Sell it to stable coin after receiving.
Store it in your business treasury with a plan of holding.

The third option means your business must have deep budget and don't have need to rotate money and cash out bitcoins received from customers too often. But budget must be available to use for long time, to avoid risk of selling bitcoin in bear market.