Transaction speed versus deposits / withdrawels processing speed on exchanges :
You can have a cryptocurrency thats lightning fast but if exchanges or other services put a lot of transaction confirmations needed on such transactions
before they deem them safe and protected against doublespending, then users will still experience slow speed.
Ideally you want a cryptocurrency thats not only fast with its transactions on its own network but also only need a minimum of transaction confirmations
imposed by exchanges or services.
Dash has a number of exchanges that accept its InstantSend technology on deposits and or withdrawels. Which means you get your transaction from
sender to receiver within a few seconds, protected against doublespending, no additional fees, immediately spendable and the exchange involved only
impose 1 transaction confirmation before deeming it safe.
These exchanges for Dash, who are accepting its InstantSend on deposits and/or withdrawels are :
https://www.reddit.com/r/dashpay/comments/bhoos3/these_exchanges_are_dash_instantsendenabled/ Dash transactions with 4 input amounts or lower will be automatically and by default handled through Instantsend, without any additional fees, immediately
spendable and protected against double spending. Exchanges just need to update their confirmation system to provide these benefits to its users.
https://blog.dash.org/chainlocks-and-llmq-based-instantsend-mean-digital-cash-efe2852da9ca