[BUG] Account VAR model is very slow to execute

[v1nvn]

Describe the bug
Account VAR model is very slow to execute for wallets with many tokens

To Reproduce
Execute account.var model with the following input:

// This address has 10 tokens
{
  "address": "0xB9711550ec6Dc977f26B73809A2D6791c0F0E9C8",
  "window": "180 days",
  "interval": 10,
  "confidence": 0.01
}

// This address has > 100 tokens
{
  "address": "0xE92d1A43df510F82C66382592a047d288f85226f",
  "window": "180 days",
  "interval": 10,
  "confidence": 0.01
}

Expected behavior
It should execute quickly