So, the beast isn't a figurative term? And can a figurative dragon be bound with a literal chain in a literal bottomless pit or prison?
Do you somehow not know that the term "thousand" is used figuratively several times in scripture?
Here are some examples:
Deuteronomy 7:9 Know therefore that the LORD thy God, he is God, the faithful God, which keepeth covenant and mercy with them that love him and keep his commandments to a thousand generations.
1 Chronicles 16:13-17 O ye seed of Israel his servant, ye children of Jacob, his chosen ones. He is the LORD our God; his judgments are in all the earth. Be ye mindful always of his covenant; the word which he commanded to a thousand generations; Even of the covenant which he made with Abraham, and of his oath unto Isaac; And hath confirmed the same to Jacob for a law, and to Israel for an everlasting covenant.
Psalm 91:5-7 A thousand and ten thousand are used together in Psalm 91, saying, "Thou shalt not be afraid for the terror by night; nor for the arrow that flieth by day; Nor for the pestilence that walketh in darkness; nor for the destruction that wasteth at noonday. A thousand shall fall at thy side, and ten thousand at thy right hand; but it shall not come nigh thee.
Deuteronomy 32:30 How should one chase a thousand, and two put ten thousand to flight, except their Rock had sold them, and the Lord had shut them up?
Joshua 23:10 One man of you shall chase a thousand: for the LORD your God, he it is that fighteth for you, as he hath promised you.
Isaiah 30:17, One thousand shall flee at the rebuke of one; at the rebuke of five shall ye flee: till ye be left as a beacon upon the top of a mountain, and as an ensign on an hill.
Psalm 84:9-10 Behold, O God our shield, and look upon the face of thine anointed. For a day in thy courts is better than a thousand. I had rather be a doorkeeper in the house of my God, than to dwell in the tents of wickedness.
Psalm 50:10-11 For every beast of the forest is mine, and the cattle upon a thousand hills. I know all the fowls of the mountains: and the wild beasts of the field are mine."
Ecclesiastes 7:27-28 "one man among a thousand have I found."
Job 33:23 If there be a messenger with him, an interpreter, one among a thousand, to shew unto man his uprightness.
Job 9:2-3 I know it is so of a truth: but how should man be just with God? If he will contend with him, he cannot answer him one of a thousand.
Isaiah 60:21-22 Thy people also shall be all righteous: they shall inherit the land for ever, the branch of my planting, the work of my hands, that I may be glorified. A little one shall become a thousand, and a small one a strong nation: I the Lord will hasten it in his time.
Amos 5:1-4 The virgin of Israel is fallen; she shall no more rise: she is forsaken upon her land; there is none to raise her up. For thus saith the Lord GOD; The city that went out by a thousand shall leave an hundred, and that which went forth by an hundred shall leave ten, to the house of Israel.