The "bottleneck" is usually not the trade itself, but the into or out of the system.
: A new block is mined roughly every 10 minutes .
: During peak times, unconfirmed transactions can sit in a "mempool" for hours or even days if the attached fee is too low. What is crypto day trading? - Kraken
: These execute immediately at the current market price.
Buying and selling on centralized exchanges like Coinbase or Kraken is typically .