pipが応答してくれなくなった

cloud9で仮想通貨のbotを作成しています。

全くの初心者なのでまずは、有料の物を購入して勉強しようと思っています。
BOT本体のソースコードに以下のようなものがあり、稼働に必要なモジュールなのかなと思いますが、インストールを試みてもエラーが帰ってきてしまいます。
必要だと思われるモジュール↓

import requests
import numpy as np
import json
import datetime
import time
from datetime import datetime as dt
from datetime import timezone, timedelta
import pybitflyer
from time import sleep
import talib as ta

発生している問題・エラーメッセージ

ec2-user:~/environment $ sudo pip-3.6 install requests
Traceback (most recent call last):
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 658, in _build_master
    ws.require(__requires__)
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 972, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 863, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.VersionConflict: (pip 18.1 (/usr/local/lib/python3.6/site-packages), Requirement.parse('pip==9.0.3'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/pip-3.6", line 6, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 3049, in <module>
    @_call_aside
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 3033, in _call_aside
    f(*args, **kwargs)
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 3062, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 660, in _build_master
    return cls._build_from_requirements(__requires__)
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 673, in _build_from_requirements
    dists = ws.resolve(reqs, Environment())
  File "/usr/lib/python3.6/dist-packages/pkg_resources/__init__.py", line 858, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==9.0.3' distribution was not found and is required by the application