You might think it is big and powerful and you can't do anything about it. I don't think so. He's only leveraging his multiple accounts in a way that you think he is that big and powerful. But in fact, it is big, but surely not allmigthy.

Here are his accounts with the respective Steem Power:
(Only SP on the account plus SP delegated to other accounts; SP delegated to the account is not included; all numbers rounded.)

Account	Steem Power
engagement	450000
nextgencrypto	124000
thecyclist	79000
ozchartart	70000
thedelegator	43000
iflagtrash	36000
yougotflagged	27500
randomthoughts	20000
steemservices	17700
ngc	14000
thebotkiller	12000
danknugs	8000
randowhale	6600
theyeti	5500
berniesanders	4300
thesloth	2800
rewardpoolrape	2100
nogalert	1700
abusereports	1400
the.bot	1200
charlesmanson	200
elchapo	100
indica	100
jacktheripper	100
jeffreydahmer	100
nextgencrypto100	100
steemservices1	100
steemservices3	100
steemservices5	100
chatterbox	50
muhammad	50
nextgen1	50
nextgen10	50
nextgen11	50
nextgen12	50
nextgen13	50
nextgen16	50
nextgen2	50
nextgen3	50
nextgen6	50
nextgen7	50
nextgencrypto101	50
nextgencrypto110	50
nextgencrypto111	50
nextgencrypto120	50
nextgencrypto121	50
sativa	50
sockpuppet	50
steemittroll	50
theghost	50
theterrorist	50
yomamasofat	50
kimjongun	20
cached	0
ghettodweller	0
illbeyourfriend	0
liquidity	0
ngcrep	0
nxtgencrpto10	0
rewardkiller	0
theconnoisseur	0
thecurator	0
thedumpster	0
treazurey	0
In Total	954,470

• I found a couple of other accounts with strange connections to the account network, but I am not sure in which relation they stand. The connection could range from loosely related to his real identity.
• Most of the accounts are inactive and are only used rarely for his flagging excesses. For the most flagging he uses about a dozen of accounts.
• With @randowhale and @upmyvote he's running two profitable upvote businesses.

These upvote bots are vulnerable, because it is possible to drive away his customers. That's a bit of work, but possible. And as soon as his upvote bots have fallen, he's going to have a revenue problem...

His fortune of almost 1 million SP won't help him much in that case, because most of it is delegated and spread throughout his network. This means, he can only partially access the voting power of that.

Insolvency is possible

update

@upmyvote is owned by @themarkymark. It ended up on the list, because it has a (paid) delegation by bernie/nextgen.

You will find all my posts in this matter under the tag #curbyourbernie