Yes, it's 900 mBTC or 900K bits.

I can do a logo at any price range, but I don't think it's worth to have a logo that somebody spent only 30 minutes on in total, which is what you get for 0.1 BTC. It's a logo that is usually uninspired and even a copy of something that exists out there. Doesn't enhance the brand and doesn't contribute to the success of the company. It's not something the owner wants to etch into the marble floor of his office. It's just a mark that is temporary and will be changed as soon as the owner realizes the value of a good brand. A 0.1BTC logo is a different type of service from what I offer.

I do realize that you can be lucky in 5% of the cases and you may get a good logo for a few mBTC by chance or because you find a designer who does proper work for the fun of it. But in the large majority of the cases the client will only waste his time and money on such exercises.

I think one such example was the Nike logo where the student designer created a symbol that made the company famous and it cost only like .2BTC in Today's money. But that stands against thousands of great logos that cost in the range of 1BTC-100BTC.

For a good logo you need to spend time on understanding and clarifying the client's needs, which is at least 30-60 minutes unless you work with a very experienced client who gives you a great brief from the start.

You need to do your research into the industry, this can be again at least 30-60 minutes. If you're lucky you may be working on an industry you know very well, so it can be less.

You need to do brainstorming or ideation for at least 2-3 sessions 30 minutes each.

You work out 3-4 concepts for the client for at least another hour or more.

If you're lucky the client likes one option and you spend at least an hour perfecting it and then developing various color and layout options to develop a small identity guideline for another hour or so at least.

If you add it all up it's at least 5-6 hours till completion if everything goes smooth. That means ~$50 / hour fee, which is very fair and even a bit too low for a seasoned professional.

Also, 0.9BTC for the face of your company is nothing. You can make that up with the first deal you make with your client. A good logo can raise the valuation of your company and sales instantly by 5-10%. That's why companies spend literally hundreds of thousands of dollars on rebranding efforts. It's a good investment.