I would offer. Why look to a sign to wonder, wonder after rather than prophecy? 
Jesus said its natural unconverted mankind that does look to a sign before they believe or exercise "faith" Hearing the understanding coming from 
God as 
it is written (sola scriptura).
Prophecy has ceased the whole book of prophecy sealed to the end of time.
Satan the king of lying signs to wonder, wonder, wonder after as if true prophecy is working overtime today  
2 Thessalonians 9_11Even him, whose coming is after the working of Satan with 
all power and
 signs and lying wonders,;And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.And for
 this cause God shall send 
them strong delusion, that they should believe a lie:
The sign and wonder seekers that made Jesus into a circus seal 
John 4:48 Then said Jesus unto him, Except ye see 
signs and 
wonders, ye will not 
believe.
John 6:30 They said therefore unto him, What 
sign shewest thou then, that we may see, and 
believe thee? what dost 
thou work?
The last chapter in the book of prophecy (Revelation) in the first verse it sets the interpreting key .
 Not only did he send it but he
 signified it .called Hidden Manna in 2:17. The language or tongue of parables Hiding the understnding from Satan who is not subject to salvation. It's a wonder to him that he will never know the end of 
Revelation 11 The Revelation of Jesus Christ, which God gave unto him, to shew unto his servants things which must shortly come to pass; and 
he sent and 
signified it by his angel unto his servant John:
No out of body, I had a dream or heard a voice.    doctrines of lying spirits 
Why wonder when Christ has given us his living abiding word in its entirety?
The first three parables using the word "thousand" to represent an unknown set the stage the other three in chapter 20 of Revelation. The spiritual unseen does not become the literal seen in Revelation. 
Thousand an unknown in reference to time as well as other things 
Genesis 20:16-17To Sarah, he said, “I’ve given your brother one thousand pieces of silver. It means that neither you nor anyone with you has done anything wrong. Everything has been set right.” ;Abraham prayed to God; and
 God restored Abimelech, his wife, and his women servants to health, and they were able to have children.
 
Above the word thousand the gospel understanding "Everything has been set right. "all were blessed with children."Thousand = all"
In that way parables do not change the simplicity of the gospel (Christ saves sinners pouring out his spirit life in jeopardy of his own Spirt on dying flesh but do enrich like honey 
Psalm 90:4 For a 
thousand years in thy sight are but 
as yesterdaywhen it is past, and as a watch in the night.
The gospel Christ our savior is not subject to time 
Ecclesiastes 6:6 Yea, though he live a 
thousand years twice told, yet hath he seen no good: do not all go to 
one place?
The gospel Christ our savior even if he lived twice he end up in the same place 
2 Peter 3:8 But, beloved, be not ignorant of this one thing, that one day is with the Lord as a 
thousand years, and a 
thousand years as one day.
As one day not is one day .
Many times, in parables the word "thousand" is used to define an unknown. No signs were given to wonder after.
Our invisible God remains a Spirit that lovingly commands to worship him in spiritual truth as it is written. Comparing the spiritual (not seen to the same ) faith "Let there be power" of Christ that mutually works in us. .  to Christ who can work in us .Faith to faith the gospel