He has traded sir not long ago but most cash is tight up in POS and MBN, MBN from per DOCA days, and pos bought in few years ago at a high.
Aim here is to get cashed up SIR holders to buy into to those two and wishing for a sir "pump and dump" style rises to either or both of the other two stocks.
nothing wrong for a small holding of both of the other for a punt, but SIR will always be the shining star that will provide continue growth. Especially after production start.