Ann: Change in substantial holding from FFT, page-7

You can buy as many MSP shares as you like and they are trading as normal at the moment and will continue to do so for some time.
FFT having their holding over 75% will apply to delist MSP which will making trading of their shares harder. This isn't an overnight process so you will have time to dispose of your shares in the event you decide you don't want to hold an unlisted company.
FFT requires 90% holding to compulsorily acquire the remaining MSP shares, which they do not currently holding as of their last change notice.