As compared with the preceeding 6 months, total BTC volume is down 13% and number of trades is down 4%.

Altcoin BTC volume is down 5% and number of trades is up 4%.

This increase in altcoin number of trades, is likely due to more XMR delistings in the last 6 months. Bisq is one of the best places to exchange larger sums of XMR for BTC and vice versa.

Fiat BTC volume is down 29% and number of trades is down 7%.

These stats don't include Bisq 2, which one can expect has eaten into some Bisq 1 volumes.

Also as BTC price goes up and people typically trade fiat denominated amounts, the BTC denominated volume tends to go down.