I'll be worried about a potential Amazon monopoly if they keep increasing market share for the next 20 years. But I don't think that will happen -- the Internet seems to have a way of shaking even apparently unassailable monopolies on very short timelines.
As a personal example, I've already moved a lot of my purchasing from Amazon to AliExpress. For anything small, fairly cheap, and that I don't need this week, I search AliExpress first. Quality can be uneven and you sometimes have to read between the lines on the reviews, but you can often find items identical to those on Amazon at 1/5-1/10 the price (eg. I just bought 3 sleeved baby bibs on AliExpress for $1.80/ea -- the going price on Amazon seems to be $16).
> (eg. I just bought 3 sleeved baby bibs on AliExpress for $1.80/ea -- the going price on Amazon seems to be $16).
I couldn't help but wonder if there is such an explosion of babies with more than two arms that there could be a competitive market in bibs with three sleeves!
With RadioShack going under, AliExpress is my goto for basic electronic components, but it can be painful when you need to wait 3 weeks for a new part to arrive.
But I don't like how Amazon because of how they treat their workers. Maybe the engineering positions are awesome, but warehouse workers and deliverers seem to be worse off than a Wal-Mart employee 10 years ago
Alibaba is going to step on their toes in a major way within the next few years after they start building out a more robust presence of their own in the US (that's purely conjecture and hope)
As a personal example, I've already moved a lot of my purchasing from Amazon to AliExpress. For anything small, fairly cheap, and that I don't need this week, I search AliExpress first. Quality can be uneven and you sometimes have to read between the lines on the reviews, but you can often find items identical to those on Amazon at 1/5-1/10 the price (eg. I just bought 3 sleeved baby bibs on AliExpress for $1.80/ea -- the going price on Amazon seems to be $16).