I think the OP was saying anything is possible at this stage and not to throw stones so early in the campaign.
You posed a fair question about finances. I looked into it. He's a little behind where Obama was in '07, but part of that has to do with when they entered election.
Obama brought in $103,787,457 in '07. Sanders brought in $74,463,783 in '15. However, Obama was a candidate for four quarters of '07 while Sanders was a candidate for three quarters of '15. Their quarterly hauls as an average is very similar, but Sanders is trending is a much more positive direction as you'll see shortly.
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Obama's Quarterly totals (Source)
Q1 '07: $25,797,722
Q2 '07: $33,120,440
Q3 '07: $21,343,291
Q4 '07: $23,526,004
Total: $103,787,457
Avg: $25,946,864
Sanders' Quarterly totals (Source)
Q1 '15: N/A
Q2 '15: $15,247,353
Q3 '15: $26,216,430
Q4 '15: $33,000,000 (Campaign Estimate)
Total: $74,463,783
Avg: $24,821,261
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The thing that stands out to me is that Obama's fundraising was uneven in '07. His two strongest quarters were his first two. Sanders has been trending in the right direction and if he wins in Iowa and New Hampshire I'd expect that trend to continue.
You can make a legitimate claim that Sanders doesn't have a SuperPAC and that could come back to haunt him, however, I think his desire to walk the walk has made him a candidate that the internet has seemed to rally around in various forums (including DU). I'm not saying you're wrong, but I feel perfectly find going up with someone who can capture imagination. Obama did it in '08, and it led to fundraising records. The fact that Sanders has been consistent for so long means people know he's not just blowing smoke just to get elected. I'm looking forward to watching it play out.