If you've received 10 $1000 payments from your job in bitcoin and now want to buy a brand new $10 000 toaster, you'll have to create a transaction that has 10 inputs and one output.

A more typical example is a miner who receives very frequent payouts from a mining pool over the course of a few months, and then wants to send all of their money to a bitcoin exchange to pay for their power.

Some people create massive transactions just to mess with the bitcoin network, too. ¯\_(ツ)_/¯

Edit: Someone lower in the comments asked why people create large transactions to mess with the network, and I don't really know for sure--some people have unknown motivations, or want to prove a political point. Some are public, and I assume some are done secretly. Here's an example of one that was public: https://multibit.org/blog/2015/06/23/bitcoin-network-stress-...

>Some people create massive transactions just to mess with the bitcoin network, too.

Why?

I replied to you in an edit to my post... I don't really know what was going on but when I first saw your comment there was no reply button.

Is that something that's normal on this site?

If I reply to a comment you made, there is a short time where you cannot reply to my post, I believe this is an effort to either make people read the reply post before knew-jerk replying... or to breathe for a sec and slow spamming down...

Oh, neat! Thanks.

Imagine that Stripe has received a few hundred Bitcoin transactions in the last hour and they want to move all that BTC onto an exchange.