Is there a way to crack 4 or 5 hash at once with hash cat?

[marc1n]

Yes, just moderate the hashes line by line in a file such as hashes.txt

If I add 4 bitcoin hashes into the hash.txt. How does the hashcat work to crack them. For example, ?a?a?a?a tries this mask to each of them at the same time. Or is it trying each hash one by one in order?

At the same time, which will lower your cracking speed, just this hash is very difficult to break using the bruteforce 8 X 4090 method:
--------------------------------------------------------------------
* Hash-Mode 11300 (Bitcoin/Litecoin wallet.dat) [Iterations: 200459].
--------------------------------------------------------------------

Speed.#1.........:    32990 H/s (323.97ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1
Speed.#2.........:    32991 H/s (323.96ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1
Speed.#3.........:    33171 H/s (322.21ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1
Speed.#4.........:    33269 H/s (321.25ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1
Speed.#5.........:    33083 H/s (323.07ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1
Speed.#6.........:    32857 H/s (325.24ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1
Speed.#7.........:    33080 H/s (323.10ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1
Speed.#8.........:    33310 H/s (320.87ms) @ Accel:16 Loops:1024 Thr:1024 Vec:1
Speed.#*.........:  264.8 kH/s