Potentially - I'm just thinking in the grand scheme of things how you would get rid of it or transport if necessary. Not everyone has a car or trailer and rely solely on their bike for transport. A bike trailer might be low enough to load it I guess, but most other trailers / estate cars are probably too high to be able to lift it... if you could
I was trying to think of some method of breaking it down in to smaller pieces - but being able to do this defeats the objective of making it too much hassle to steal
True, but you'd only need to transport it when moving house, and for that you'd use a van at least.
Might be getting a bit overcomplicated now, but cast the concrete in doughnut shaped sections with a steel bar running laterally through each hole. You could run a strong chain through each while they're on their side, and padlock them together one on top of another and tip them up onto the base. Have to make the hole small enough so scumbags can't get in and break the lock/chain though.
Something like this (check my MSPaint skills!)