You heard bullshit.
I use Cat on a 8 years old dual core, on 10-25 markets at the same time.
The whole problem here is the difficulty in using it as someone posted here. I'm a real noob at this stuff .. meaning a newbie at it.
And I dare not take the chance of losing .75 BTC on something I won't be able to use.
Then C.A.T. is probably not for you (yet). I suggest learning the basics of trading, especially ping-pong trades to make some small profits on volatile markets. Once you can reliably make (small) profits by repeatedly buying low and selling high and you come to think "Wouldn't it be great if my computer could do this all day and night long for me" then it is the time to think about buying a C.A.T. license and let it do the job for you, basically C.A.T. follows your own strategy for you when you need or want to be AFK.
In other words: If you know what you are doing on a market, C.A.T. can do that for you 24x7 reliably. C.A.T. is no magic bullet that "just makes money on altcoin markets".
C.A.T. has a lot of settings you can adjust, that can be overhelming in the beginning. But once you realize you only need to create a ping-pong trade with default settings it becomes very simple as Sampey says.
C.A.T. is extremly stable and it certainly has no memory problems and is very lightweight in its resource usage. I run it on a VPS with 1G RAM for ~30 markets on 2 exchanges, current uptime is over 45 days (yeah sorry Sampey, still running 3.5 at the moment but I promise to update soon ).
Yes I'm trading a little but I don't know what ping-pong trades are..... so maybe it's not for me.
Thx