I have upgraded 3 accounts to LTMs in BTS 2.0, for different reasons.
* The first one, "in.abit" is for witness. Although I have another LTM "delegate.abit" already, since "in.abit" is the one I used in test network before the release of 2.0, I upgraded it in the 2.0 network.
* The second one, "abit" is mainly for saving some money when creating assets, and maybe future usages for example trading bots and/or creating accounts.
* The third one, "bsip10-worker" is for worker. In order to make it possible for committee to act as an escrow of BSIP10 worker proposal, I created the new account, and set it to multi-sig.