It can be very hard in highly niched domains. Very niched products typically have a high price / low number of customers profile, meaning you want to really be

It can be very hard in highly niched domains. Very niched products typically have a high price / low number of customers profile, meaning you want to really be sure the product is right for you, but won't find any (or very little) recommendation online. Imagine a consultant who offers consulting on using cryptocurrencies as a payment method for your online business. The fees are $250 per hour. You're a paypal user and briefly considered using bitcoins for your online business, but are not sure about it. Or imagine a physiotherapist who offers a treatment for a very rare (but not life-threatening) condition no traditional medicine could cure. It is rather expensive, but the guy says he can help you, yet you won't find any testimonial on the web because of the rarity of the condition.